Personal opinion. Asus is really good right now. HP businss laptops are good, for some reason their home pc's are crap right now. All companies have been using tech that pushes the envelop or has low yield problems for chips and such. As these are used, more hardware failures are seen and RMA's become more common.
Macs are not exempt from this either (they use the exact same hardware) and there have been a few issues with certain lines of Macs. They are nice in their own way and for the software issue, you can still put Windows 7 on it too lol, but it is very expensive in comparison with equivelent hardware.