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I think it really does come down to portability first. If you want a machine you can take with you, then go for a MacBook Pro, since you have the cash for that.

If you don't need the portability, then get a desktop machine with a real keyboard, mouse, and monitor.

As others have said, a Mac Pro sounds like overkill when compared to an iMac. Since you have the cash to spend, get a fully loaded 24" iMac with the fastest cpu, biggest/fastest disk and as much RAM as will fit, and you will have an awesome machine - and one that will look awesome in your room.

If you just have to get the Mac Pro, at least get a cinema display to go with it. Why spend $3,500 on a computer like the Mac Pro, and then get a mis-matched Dell monitor? I know the Cinema displays are a bit over priced (LOL), but cost does not seem to be an issue here...

Even better - if you have the cash, get the iMac AND a MacBook, so you have the best of both worlds...
 
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