The MBP is fine, but you need more power and screen real estate - i.e. the Mac Pro and a good monitor. But the problem is that now's not the greatest time to buy a desktop. Its very likely that the line will be updated in the next six weeks or so.
didn't the mac pro just get a processor update (clovertown)?
i went ahead and ordered this:
on it's way
1st thing to upgrade... more RAM.