I tried, as much as I can, to prioritize the list... Hope you make use of them... If you've got more sites to add, please feel free to add them as comment to the post... Thanks in advance :)))
ENJOY...
http://www.vertor.com
http://www.isohunt.com
http://www.torrentroot.com
http://www.torrentz.com
http://www.bitsoup.org
http://www.flixflux.co.uk
http://www.demonoid.com
http://www.mininova.org/
http://www.entertane.com