I gotta ask. Why Vista 64 over XP 64? I have a server that runs rock solid with XP 64 and 4+ gigs of ram. I also have a system that runs Vista 32 and while Vista is functional.... I hate it. It gives off errors, annoys the user, has a ton of driver issues and obfuscates (to me an experienced user) some key features and settings. Plus, real Nvidia support for their 8800s is still desperately lacking.

Vista offers absolutely NO compelling benefits for gaming right now (and it is HIGHLY doubtful WoW will go DX10 only in the next 2 - 3 years. So why load it at all?

Plus driver support for Vista 64 is even worse. XP 64 at least isn't that bad.

I have one of these: http://www.3dconnexion.com/3dmouse/spacenavigator.php

Not too bad - a bit unresponsive though but I didn't tinker with it toooooo much. The explorer might be a step up - but don't expect WoW or EQ (?) to integrate it natively any time soon. Would be a great way to use your flying mounts though.