If you intend to do no gaming whatsoever, go with the HD5450. But for some light/casual gaming, just get an HD5570. Both cards are quite silent, while the 5570 packs quite a bit more punch for just $35 more.
Looking at those two, I think the HD5450 will do everything that I need - and it's fanless so I think that one is the winner!
This is my 1st posting on Tom's, can't believe I got some great advice so quick!
I'm just a kid with too much time (at least until I get a job/GF, ).