Been using beta for a few months, installed RC tonight, seems pretty much the same.
Still a good OS though.
A small checklist to remember
Turn down UAC or off
Set your Power settings.
Make sure to change the border padding of windows to 0 :P
Turn off Swap file if you have 6+ gig
Install windows essentials for some handy tools like msn
Virtual clone drive
all of these work good on x64