$150-ish is really the most I want to spend...which can get me a GTX560 after rebate, so I can spring for that. I'll search my local CL again, but last time I looked I didn't see anything remotely approaching a GTX560 TI. Really, I want to keep the price low, because I'd rather focus my distributed computing dollars on another WCG system (a HD5770 runs the games I play at max settings, so anything faster isn't really needed for this).
I'll poke around online as well to see about a used 460 or 560TI. About what PPD do these cards do?