Man forget about Vista for anything performance. I have a beefy system and it wasn't performing that great on Vista at all. Went back to XP this weekend and began to breathe lightly again. DONT DO IT!!!!
I have been putting on and off, I image it, so going back and forth is no biggie. I am running a x6800 with 4 gig ram it seems to be OK, I know vegas 7 does not run at with it, but I was thinking since 6 does not have media manger it might work?