this is the rack version of what i use:
its the digidesign 003+
8 inputs, 8 preamps, 8 seperate outs, mains out, mon out etc. + fully digital and expandable thru adat.
+ it means you can dip into the sexy world of protools
also runs perfectly with logic, cubase etc.
bit steep as its nearly €1300 butt worth every penny.
im running with XP pro sp3 32bit but theres no problems with 64bit over at the protools forums. the new 64bit drivers seem solid enough so far.