I hear you...I think that we have to first know, regarding COD, what will be the "bottleneck" in terms of performances...It could be the CPU itself...
So a top dual video card may be useless for now...
Since the I7 2600K is the fastest CPU , and costs only $325.00, we may
be quite ok with mid perfomance cards if we get a fast CPU like the I7...
We will know in few hours !
Salute!
The i7 2600k is not the fastest CPU. That would be the following: