Corsair TWINX512-3200LL, TWINX1024-3700 OR CMX512 -3500C2 which is fastest?

Hi Everybody,

This is the definitive question, what modules are the fastest for running
Apps like Photoshop,Office 2000 and 3D Games etc.

Of the three modules over at Corsair
http://www.corsairmemory.com/xms/xms_modules.html which is the absolute
fastest, the low latency modules or the modules with the higher bus speeds ?

Having a higher bus speed does this translate to mean higher data
thoroughput?

What I mean is what will give the highest data transfer rate, I think?

I am aware that arragement of 2x 512 modules as to enable dual channel mode.

Ben.