I'm the originator of this thread. so I thought I'd top it off with an explanation of what partitioning I finally ended up with, FWIW:
Disk 0 internal 1,5TB
drive C: [200gb] Win7
drive D: [500gb] Data
drive K: [200gb] "spare" windows partition
drive P: [500gb] Programs
disk 1 internal 1TB
drive B: [1tb] Backups
drive C is for the OS and MS office programs and files and others that "like" to be on c: hibernation file, swap file Windows Folder, system, Boot sectors and other reasonably small base utility programs
DRIVE D is for personal Data, email files, Music, downloads, etc
DRIVE K was created as a recover win7 installation, and I've kept it spare (and Bootable)
DRIVE P is where the rest of the programs go, especially big ones, like Desktop publishing, dictionaries and other references,
DRIVE B is for Backups of programs and data as required, note it's on a separate internal hard drive from everything else, for better recoverablity.
Additionally there are two "recovery partitions" (~20gb total), left over from the factory install and a couple of external drives used for extended backups and data
This setup works for me and has certain advantages (I'll go into more detail if anybody cares enough to ask...
Your Mileage may vary...
Thanks to all who answered here! I hope someone may benefit from this thread