So, before I'll return to my roots next year and relive my ZX childhood memories, I would like to spend a little time with the Atari 2600 (which I never had). Could anyone run me through the basics to get me started ? I don't want to start an Atari collection, but I don't want to play using a RF connection either, so....
- Atari Wood vs. Atari Jr vs. 7800 ? Does it matter ?
- S-Video Mod is the best, right ?
- Harmony Flash cart ?
- PAL vs. NTSC is determined by the games, not the system ?
- Will NTSC games/roms output on a PAL machine (except for the wrong colors) ?
- other mods to play PAL and NTSC with RIGHT colors on the same machine ?
- which controllers do I need ? digital versus analogue ?
Anything I missed ? I hope for some help by the Atari veterans

Thanks!