Mac Pro is going to be fast...My Core Duo Mini is faster then my iMac G5(it was the first one, but there wasn't a HUGE speed increase in the G5 iMacs)
But for what your doing, I think a MacPro might be overkill. A simply Firewire drive will work just as well. Or get an iMac with a 750GB harddrive if you don't want to think about space. (Only on the 24'' Model, but still cheaper then a Mac Pro,even more so if you need to pick up a display with it)
I'd say go with a 2Gb iMac 24'' with 750Gbs Hardrive...that a fast computer and prices at 2573USD. A Mac Pro would last longer, but I think by the time your iMac is "slow" you could put a new chip in there.
But for what your doing, I think a MacPro might be overkill. A simply Firewire drive will work just as well. Or get an iMac with a 750GB harddrive if you don't want to think about space. (Only on the 24'' Model, but still cheaper then a Mac Pro,even more so if you need to pick up a display with it)
I'd say go with a 2Gb iMac 24'' with 750Gbs Hardrive...that a fast computer and prices at 2573USD. A Mac Pro would last longer, but I think by the time your iMac is "slow" you could put a new chip in there.