As Dragons said, noise is definitely an issue. But then, even a "quiet" PSU is loud these days considering the higher wattage coming out of it and the bigger fan required to accomodate it. It simply means, quieter for the spec.
I know myself all the modern cards I have owned between 52-64% I can handle them, beyond that, I find the noise distracting.
But yeh, the 5770 for reso 1680x1050 and 1920x1080 it should play decently enough. I wouldn`t ask it to do any miracles, but it is a budget gaming card. I know a freind of mine was playing BC2 and BF3 with his and an a first gen i7 800 series cpu, he actually played quite well, so the card is decent enough. Just dont run the settings to the moon and you`ll be happy.
If it is a non refrence cooler, even better. As the temps, power, and how cool it will stay I am sure you will enjoy. I guess the term "noisy" is as always subjective. A hair dryer sound, a constant high speed whine, or a constant whoosh of air are all "noisy" but some get one the nerves more
I like 295.
I think part of that issue is Nvidia waited awhile to release the 295 to make sure there was enough functional dies to go around for the other cards and such, where in the 600 series the yields to get the cards out there initially at least were horrid(more in regards to functional AND at proper clock speeds) this is part of the reason the prices are so bloody high, well that and that is one hell of a cooler on the 690, if there is one card Nvidia did exceptional with, that would be the 690 even though I am anything but an Nvidia fan, I think its a hell of a nice design, prices aside.