I'm running vista ultimate edition and i love it !!!
only 1 or two teething issues at the start ( due to it not liking playing downloaded films ) but thats all sorted now :D
Linked up my 360 to my network without and hassle and everything is doing what it should :D
P.S im well jealous of your screen !! I've got 2 screens at the mo... 2 x 19 inch widescreen monitors... but i'd way prefer the single MAHOOSIVE one !!