Well I have worked for Dell, HP (when it was Compaq), Samsung and smaller IT companies as well; my pick's for quality, price and support is as follows:
1, Dell
2, HP
3, Lenovo (new name when IBM sold them overseas)
All others are a tier 2 or 3 (or worse!) MFG in the PC world.
Cliff, KLBE doesn't sell PC's (locally dealer when I looked last time) but I know a company whom I worked for called CDI (computer dealers inc) who take off lease from 'big business' after a year or so (max 3 years old hardware) and they do a 100% rebuild and sell it to small (and large) resellers of IT hardware for very low prices and with a good warranty too. Feel free to MSG me if needed.