Hi
I need help buying a computer. I am not able to build my own system( I know this is the best way) so I am looking to buy one of these

DELL XPS 600
ALIENWARE Area-51 ALX
FALCON PC MACH V
VOODOO PC OMEN

Can anyone tell me what would be the best buy or even another brand? I mean not by price wise, I want a PC that has the best warranty tech surpport and are rated the best? Don't want a problem PC also.(You know one that breaks down always) What do you think guys? Anyone have any experience with these models? I want to know both good and bad. Any help would be greatly appreciated.

Thanks in advance
Shawn