The limiting factor will be the amount of money you can spend.
For an interactive workstation with the possibility of expansion I recommend:
ASUS CUV4X-D - Dual capabile MB.
Fastest PIII you can afford - a 1 GHz is going for about 260.00
A Leadtek Geforce Ultra 2 if you are funds limited, a Fire GL2 if you have some cash to spend.
I wouldn't spend any money on duals for a workstation. Until Maya 4 come out, we don't get any benefits from duals except for rndering. But you have the option with this MB to expand it, if you want to cruch frames overnight.
I have built a dual 1G system with the above board, 512MB RAM, 15G HD and a Geforce Ultra 2 with all needed extra pieces, minus monitor for about 1500.00.
If you have any questions feel free to email.
adam...
adamhill@pobox.com