ecost, directron and computergeeks, and likely others, will put you on their email list and they often offer deals you can only get thru clicking on their email specials. Others do this as well.
So you might want to go register for email, i find ecost and computergeeks really offers good deals this way.
I have seen a hundred of these threads where the person asks about which websites are best and newegg is actually the number one choice all the time. I dont get anything saying this, same as Badfrog doesnt, but the truth is the truth. The reason newegg is so good is their low prices, low or fair shipping rates, HUGE inventory, and they have the most uptodate parts around, not rejects or seconds like tigerdirect.
There are plenty good sites, most are fair and honest, but some are better than others when you factor in truth-in-advertising, shipping fees, return policy, etc. That is where newegg comes in, they are good at all these things!
Again, though, some others are good too, frys, zipzoomfly, etc, etc.
I can honestly say that i have a lot of experience ordering computer parts via the net. I am in Canada so i order from Canadian sites as well, but i have a US shipping addy so i can order from US sites as well.
Good advice + great people = tek-tips