there is no X2 3200+
and yes, the CPU will limit performance a lot of the time...
I'm in the same boat.
I have a Sempron 2800+ at 2.0GHZ
and I also have a 7900 GT, which I've overclocked to 750MHZ
but, as far as actually playing games, it depends on the game itself.
I play Generals a fair bit, and my CPU is a bottleneck especially against 4 or more hard enemies
it'll run half life 2 on max settings without lag though.
also, my 3dmark05 score is being crippled by my CPU. I get about 8300.
I should be getting over 10,000
especially with my card overclocked at 750MHZ