lol, why am i not surprised? so your coming up for a TB of storage, neat.
nobody really wants to go out on a limb and say exactly how much to use as far as PF is concerned, most people agree its 1.5 times your current RAM, your supposed to keep a certain amount on the OS partition because if your computer crashes the memory dump may/will be lost if the PF is on another volume, personally i would split it 1GB/2BG as you have plenty of free space.
if your really interested go to administrative tools > performance, add a couple of counters (select the "paging file" from the drop down), and leave it for a while, play a game, do some work, see what it does, should show you any PF activity although i guess you dont need to really use it much if you have 2GB of ram.