Anyone using Poser 7 with a Mac Pro?

I use Poser from efrontier 'recreationally' to add an occasional comical animation to my class lectures. My dinosauer iMac (the bowling ball with the chrome neck and 17" screen) could handle Poser 4, but is overwhelmingly inadequate for the more current versions--P7 has just been released. This latest version has a 'preference setting' allowing 1, 2, or 4 threads.

Sounds like a Mac Pro would be perfect, but I've been scared by reports of slow drives and the advent of dual quads. (Funny how things don't change--I wanted dual quads in a Charger way back in high school. Wonder if Apple will add headers and posi some time soon.)

I'm pretty naive (no, stupid might be closer to the truth) regarding confusers, but I'd like to buy a new one that'll have a 5-6 year useful life.

I guess my question is this:

Assuming:
1-that software will evolve to higher and higher levels of threadability (Is that a word?), and
2-we see a model next week with, say, two 2.33 GHz quad-Xeons,

what configuration advice do discussion members have?

I am thinking of something like:
4 Gb ram
two 2.66GHz dual-Xeons (or the two 2.33 quads)
ATI X1900

PS: Isn't there a performance issue with FSM and software overhead associated with the dual-quads?

Well, enough of this long-winded question. I'd appreciate any input.