Is getting an iMac to play CloD a stupid idea?

[Georgio41]

I bought a new i7 iMac last week when they first came out and it runs CoD pretty well in bootcamp using Win7 64bit.

Obviously the GPU is the mobility 6970M with 1GB of memory but I am running at 2560x1440 and it looks amazing with little stuttering.
I'm a designer by trade so Mac is my main choice and it's nice to have a machine that works well with two OS's.

When external thunderbolt SSD's become available, I'll probably move the OS there and keep the HD purely for storage as that is currently the only slow element to the machine.