These are the 5 I use, I consider them all equally important
spacepotatoes.com (firingsquad.com gaming group [firingsquad.com is dead now though and not included on this list])
Pennyarcade.com
gamespot.com (I don't care what you think of their reviews, their "Top Games" layout for each platform is a phenomenal tool)
steam store (since I use steam I don't go to the website directly, but you can)
GoG.com (what games I know are officially in the bargain bin, in addition to price check indie games vs steam)
