I'm using the 32bit version. The time of install was round 20minutes! pretty fast! The only missing driver was de HECI(or something like that), videocard was no problem.:)
On Technet it is the Ultimate version! Works perfect! :):)
Very nice look, and a the reactionspeed of IE8 is very very fast!!
I've installed it on a HP DC7700 with 2GB and it get's a indexscore of 3.2 (lowest score for Graphics).