Polk Audio Monitor 50

I just moved to a new office and have some decent space and would like an economical stereo setup. So I found the Polk audio monitor 50's on sale ($85) each. I found a used NAD C315BEE for $200 so that should be decent. Maximum usage would be XM/iPod/Pandora. ohh, the question: Are these polks recommended? I am no audiophile but I like crisp and clear audio and tight bass. I listen to a lot of trance and metalcore(there's a lot of fast double bass in this kind of music)

try yamaha hs50
20k for pair ..

Cambridge Audio S30, the best passives under 20K if you're not looking for floor-shaking bass (that usually comes at the price of clarity). Usher Audio S520 for budgets up to 30K.

Too late. Already bought the polks. Thanks for the replies though.