"Or should I just wait until January 2008 when I can prolly upgrade to an all singing, all dancing 64 bit system with 8 Gig RAM???"

That is the way to go for vue and many other 3D memory hungry applications....I have been using XP 64 for over 2 years, I have 3 hard drives and 3 system for multi boot, including XP 32 and Vista ultimate 64...I stay with xp 64...I currently have 8 GIGS of ram(1066) on a Q6700 overclocked Quad...Very few problems with vue, and no memory problems.
Good luck