[FFTT]

At this point, I would hang in there just a bit longer.
Quite honestly that could mean waiting till spring 2007.

I think the Mac Pro is the right machine, but I would hold of IF you can until
Apple releases the first Quad Core Mac Pro, then compare your options.

So many things will be coming together in 2007.

UB applications and plugins, PCI-e cards and the very strong likelihood
of price drops on the current Mac Pro line-up once the Quad Cores make their debut.

Those savings alone could determine which interface you can afford.

At the very least, I would hold off until MWSF in January
to see what that "just one more thing" might be.