From what I've seen, no computer manufacturer these days is great, there are just some that suck less than others. Unlike the technology of yesteryear that could take a lickin' and keep on tickin', computers today are engineered to the edge of the envelope and consequently fail without too much help. The hard drive suppliers (Toshiba, Fujitsu, Hitachi, Maxtor, and even Seagate and Western Digital to an extent) have let their QC slip. Laptop hard drives fail way too often.
I've found Dell to be fairly reliable, and their Complete Care warranty is without peer. Sure you pay a lot for it, but for years of insurance against anything happening to your computer, it's worth the cost. Consider this: A complete care warranty will run you around $400 on your new computer. The last Inspiron 600M motherboard I replaced out of warranty for a customer came to $695 delivered, before any labor charges. It pays to have a long warranty.