Actually, in my family, the most reliable computers have been the IBMs (not so much the Lenovos; I think quality control declined after Lenovo bought the ThinkPad division) and the Apples. The Toshibas, Sonys, and Dells that we've had were all unreliable and had constant problems. It's more of a case of You Got Unlucky. I've seen people with Toshibas, Sonys, and Dells without any problems (given that my family has run through 4 Vaios, 2 Tecras, and 5 Optiplexes, though, you'd think statistics would be in our favor).
Wish I could say the same; I have had to return my previous A31p for two motherboard changes and my R50p for one motherboard change and my T60p for a screen that developed a line. None of my apples ever suffered such woes except for the egg frying MBP rev. A overheating....