I own all 3 systems and the 360 is my favorite. I have only had the red ring once on the original launch 360 but have recently gotten my 3rd one for the elite (was mad bout 5 months later the new one came out lol).
I also have a launch ps3 (I dont prefer the newer ps3's as they removed the backwards compatibility so you will still need a ps2 if you want to play your old games) and I have really only played MGS4, there have not been any other games to catch my eye (Im not a fan of killzone and god of war, and I hated the 1st Resistance and never played the second).
also I have always had trouble with the ps3 online so i prefer to pay my $50 a year to xbox for their online.
Wii is fun for some games like supersmash, mario, zelda and what not but not really a priority.