Allways check www.pricewatch.com and then check out how the company rates at www.resellerratings.com.  It can change your opinion of a few resellers.  I figure if 15 out of 20 people get burned by some company I'll probably end up on the short end of the stick.  A real good one according to reseller rating is www.newegg.com, I just ordered some stuff from them and I'll have to see how it arrives.  But the do have really good prices I do know that.