I need to find a good webcam to be used in a PC, i want it to be clear and with mic built-in, i have $70 available for this, any help?

i know i’ve asked this before, but now i have more money, i want the camera to be clear as the ones that comes in macbooks, i bought one out of eBay and looks kinda good, but the mic sucks!! this is the one i bought
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200276510483#ht_2928wt_909 , anyone have one that looks really good~???? HELP!!!