I'm looking to get a mid-range DirectX11-compatible card under $150 for some light gaming. It's important that the card runs relatively cool, quiet, and isn't a power hog i.e. it should work with a 450-watt power supply.
The nVidia GTS 450 and ATI 5750 are tops on my list right now, as both seem to offer what I'm looking for.
nVidia's CUDA sounds in interesting in terms of possibly being able to speed up transcoding of h.264 streams to my PS3 via 3rd party software, but this isn't on my 'absolute must-have' list.
Any recommendations for one or the other, and specific brands I should look for for each?