Have spent thousands & thousands with Newegg over the years, rarely do I buy electronics/hardware elsewhere.
I have built, repaired, & upgraded countless PCs from them. I've never had any huge problems with Newegg themselves, shipping companies have been another problem, but Newegg always stood behind their products, and made things right. I've even talked to real live humans the hand full of times I've ever needed to.
We ordered our 46" Samsung LCD from them, hamfisted mouth breathers at some loading dock busted the screen during shipping. Newegg RMA process, though inconvenient, was easy. The busted TV was picked up at the house, and Newegg gave us $50 for our trouble.
I had a DOA powersupply, for a PC build, Newegg shipped me a new one, didn't even request an RMA or have me ship the dead one back to them.
I've had a a few cheap motherboards arrive DOA, flake out shortly after setup, etc. never had any issues getting replacements.
While I'm a huge Newegg fan, I've been treated right by Tiger Direct, Geeks.com, and Amazon too, I just use Newegg A LOT more.
For ready made PCs/Laptops I'll second or third the Dell Outlet, though I'll caveat that with, Dell "Business" Outlet. I'm not easy on electronics, the Vostro, Latitude, & Precision lines of laptops available through the Business website are much more robust than the Inspirons & XPS lines available at the Home & Office website.
I got a pretty kick ass Vostro 3550 via the Dell Business Outlet a bit over a year ago, i5, 320 Gb 7200 RPM HD, AMD 6630m Dedicated GPU (switches on demand with intel HD), DVD burner, only 3 Gb Ram, blah, blah, blah, all shipped for just under $500. I had 8 Gb of RAM I ordered from Newegg to upgrade the laptop ready & waiting a couple days before the laptop showed up.
I used the Dell 1 year warranty with no issues to replace the DVD drive when it quit working. Dell online support chat session lead to them sending me a new DVD drive, they even offered to send someone to my house and install it for me, I declined.
So yes Newegg is good, and Dell Outlet is good. I got a little long winded there.