I figour something like this would be nice to have (fanless = 0 noise):
HIS iSilence H775P1GD (Radeon HD 7750) ~99$
A random dude on newegg:
In most things a 7750 is right around where a 5770 is (slightly above the 450),
sometimes abit faster (than the 5770). So its a decent card, as long as your willing to not use ultra high settings, with high AA ect.
This is the highest rated performance/watt card on the market, judgeing by Techpowerup.com chart. The 7750 has like 5watt idle use, and 43watts avg use.