Yea, I see where you're coming from w/ the Xbox's burning out. My first one lasted about 2 and a half years until I got the red rings of death. But overall, I feel the online play is sooo much easier than the PS3, and I can't hold a PS3 controller to save my life.
Also, I jumped back on CoD5 the other... I got smoked again! I dunno what's wrong w/ me, I just can't seem to do anything but die!
I tried downloading that Combat Arms game, but it never worked on my computer, not sure why. I might have to look back into it again.