RAM is the key as far as I can see with vue.
I'm running Vue 7.4 on a Quad core with 8 Gig RAM and an Nvidia 9000 series graphics card in an Antec gaming case to keep it all cool.
Vista Ultimate 64.
I can pretty much do what I want scene wise with all that power.
If you can throw money anywhere, throw it at the RAM

You might want to consider a Raid 5 array too, super safe.

Injustice will be avenged.
Cofiwch Dryweryn.