I'll give here a quick review of the shmups I encountered; this is not how I used to feel about them, it is how I felt about these games today, when played on real amiga, about 10-15 years later. These are just impressions, not objective reviews, as I only had one go at each. Therefore I will give no grades, only comments

Awesome
Took too long to reach the game itself. Gfx and music has nice feeling to it, but gameplay feels horribly unfair and uninvolved. I got frustrated quick.
Blood Money
I used to like this game, now I just cant understand why. Hitbox of the ship is ridiculously large, and I got killed off the walls as soon as I exited shop. Horrible!!
Cosmic Pirate
This was very nicely done 2D elite-styled shooter. Lots of missions to choose from. Nice 60fps scrolling. Playablility is nice, lots of bonuses to pick and many things to do. Graphics are terrible eyesore, but they didn't turn me off. Sadly in my saved game there was not anything to do anymore as everything was achieved, and the remaining gameplay felt too repetitive. Still, I recommend this to those who haven't tried it.
Datastorm
Graphics and music in the intro are horrible, but it is all redeemed when you start playing. Ingame graphics are detailed and clear. And playablilty is awesome, though framerate is only 30fps or even below. In this game you got so many enemies on screen for you to blast off at once that you wouldn't believe! Very generous with autofire items. Amazing enemy attacks and gigantic bosses. Difficulty is just right. I got to come back to this game, This is absolutely Brilliant Shmup!!!
Galactic
Weird game by the guy who did sanxion and delta. Luckily I grabbed the One issue which had the complete christmas edition. Smooth and solid 60fps gameplay, but very chaotic. It is very hard to figure out what is actually happening in the game or why you died. Might be worth hunting out though.
Project X
I said somewhere that I had 1cc'd this game. Now I find that very hard to believe. I mean the playability is absolutely fricking horrible!!!!!!! This has awful attack patterns, difficulty is shot to hell, first it is too hard, then boringly easy for to the end of level2, where you get crushed by insanely difficult boss. Did I forget to mention that if you die even once your weapons get so weak that you have no chance to survive. Disk labels read that this was the 'new version' but I find it hard to believe there is even harder version. But this is not challenging, this is taking a piss. Avoid like plague!!!
Sidewinder
My first amiga shmup, nice feeling of destroying and blowing. Most of the time you shoot ground-based objects though. No bosses, gets bit repetitive but not too much. Graphics are OK, remind me of old 60's scifi paintings. Sound effects are very nice, great booms and nice alien sound effects.
Starray
My old favourite game. I bought original from ebay. Playability feels still very solid, very smooth 60fps. 1st two levels have bit badly chosen colors, it is bit hard to figure out what happens, but this is redeemed in the later levels. This really gives your adrenaline system a boost. Great game.
Stardust
Difficult asteroid clone. Rendered graphics used to look amazing, now they look horribly dated. Still OK though. Playablilty matters most, though, and yes this has still nice attractive feeling to it. I remember seeing a nice thrust like subgame but I didn't get that far. Must give nod for the password system. I wonder if super stardust will feel as dated when I get it this week? Anyway, great blasteroids clone.
Swiw
I used to love this game, but this time I got totally turned off by extremely low framerate. It was incredibly difficult to get powerup. Sadly I just didn't like it any more
Virus
How I was able to play this to level 9 is beyond me. Terrible controls thrusted my ship right to the ground. I didn't want to try another ship. Reset. I should add for fairness sake that my mouse was not very good.
Xenon
First time an amiga shmup made me scream for excitement. Still looks kinda nice. First level was easy, 2nd wiped me off. Enough of this, thanks.
Xenon 2
And the obvious masterpiece. I thought first that I had played this too much, but still this left me marveling. Even low framerate didn't turn me off. This is better than many of the coin ops at its time. I love this game.
Z-out
I used to think this game was horribly frustrating. Strangely it didn't feel so this time at all. nice 60fps gameplay, even secrets were littered here and there. Graphical quality differs wildly. Though I wouldn't call it a masterpiece I would say that this is a quite decent game.
Postscript: I used have battle squadron and and hybris and X-out, but sadly I've lost my copies so I was not able to play and comment on them.. but I remember that I used to love them.
So, that was my return from the memory trip.. in summary I should say that for a serious shmups fan it is definitely worth getting a real amiga with joystick, these games are not expensive at ebay.. though my opinions were bit harsh, many of the games were holding surprising well against today's standards.. which games you should pick up I will leave for you to decide..