hey just have to add, these machines are amazing pieces themselves. usually people who join forums and are vocal are those looking for troubleshooting help and/or notebook enthusiasts, so i wouldnt be suprised if you got alot of problems with them. most of the people that are more then satisfied are not on forums.
got a 8790 i ordered mid-june 04. sent it back just before 1 yr was up for minor
but madddd annoying artifacting. got mobo replaced. been awesome since. no hdd problems (x2 raid 0). construction is overall great, no complaints.
recommended a few 5690s and 8790s to my friends back when i bought mine, and they have had no problems at all.