Hmm, 900 PPD with the PS3 vs an i7 SMP is a no brainer for me, like 10K PPD. Besides, I'M sure you also have a good GPU too to throw in the mix.;) Sorry to be so forward with ya, I'm a folding nut..;):)
EDIT: My sig doesn't show up yet so here's what I'm running,
Intel Q6600 quad, 4GB RAM, 2X...