Hm... If only MS would update the software backwards-compatibility again, then I could Play MGS2:Substance...
I Guess I'll:
1. Buy MGS:TTS (1) For the GameCube and play it
2.A. Get MGS2: Substance for the PC
2.B. If MS updates the BC again, I'll buy it for The 360...
3.A. I'll Play MGS4, without MGS3, because MGS3 is a prequel to the entire MGS and MG series... maybe watch a video or two...
3.B. If Sony updates the system f/w and adds either d/l-able PS2 games or adds s/w backwards-compatibility, I'll buy/rent MGS3
4.B I'll finally play MGS4