Over the years, I've owned many computers from many manufacturers, and worked on far more. I've probably owned or bought and set up for friends and family about 120 at this point. I still don't consider that my personal opinion can match the opinions at places like complaints.com, because the statistical base is much higher there (but skewed - see below).
Yes, I've owned Dells, eMachines, Gateways, Compaqs, IBMs, Acers, no-names, etc. (the s's are intentional - several to many of each). I've also built around 20 machines from scratch, sourcing mobos, memory, drives, video, etc. Some years ago, it became obvious that owing to the enormous economies of scale of these companies, it was impossible to duplicate their package by buying parts and assembling them at the same price, unless you bought parts at a local vendor's loss-leader giveaway sale. I used to like to build them, too.
What I found was that you could buy a machine (look at the Dell specials in Sunday flyers and in the Wall St. Journal, etc. or the discounts on eMachines at Best Buy, or the Compaq deals occasionally seen at Staples, etc.) and if you didn't quite match your dream machine, you could always open it up and add that video card or that fire sale bigger hard drive and bring it up to what you wanted. Have you seen how low Best Buy's prices get on AMD 64 eMachines?
That way, you get a perfectly good bundle and a warranty (Dell, Gateway, Compaq, and eMachines have been fine in that regard, with a few minor glitches here and there) at a bargain, usually with a donatable inkjet printer and now with LCD displays, at less than you could build it for, and if you want to add in something special, you can.
Regarding my comment about skew, I think there is another subtle reality about reading complaints.com too literally. How many times do you think that people who are perfectly happy with their machines and the OEM's service and support actually take the time to say so? We only hear the bad things at the complaint sites, but the reality is that you may be reading a report from a dyed-in-the-wool complainer, or a fluke problem (tech support people are people (you know, like Mother Teresa and Adolph Hitler and everyone in between), not perfect, and they get fired, too, when they foul up a customer). As they say, your mileage may vary.
I really wouldn't obsess too much. Just get a name brand machine, upgrade it when you get restless, and the odds, given the quality of today's boxes, are in your favor. If things go bad, it might be a minor short-term pain, but probably not much more - like getting a filling at a dentist's. Hardly a reason to go nuts.
And, by the way, the overwhelming majority of problems I've run into over the years were SOFTWARE-related, not hardware.
Just a thought.