See also my consulting services discussion.
Mac Pro / MPG Pro Workstation
An iMac or MacMini is tempting, but professionals really should be looking at a Mac Pro when speed and reliability and a flexible operating life are goals. It’s the best Mac investment you can make.
The MPG Pro Workstation is a pre-tested system targeted for professionals and power users looking for peak performance and reliability.
See Rumor Mill In Full Swing for new Mac Pro for my thoughts on why the current Mac Pro remains an outstanding choice for professionals. And why I think it’s unlikely we’ll see a new Mac Pro soon, at least not one with any major advances.
MacBook Pro / MPG Pro Laptop
The MacBook Pro has evolved to a point at which it can serve as a main machine even for users with more demanding jobs, assuming it is suitably configured with memory and drives, and presumably a docking station setup with a larger screen and backup drives.
The MPG Pro Laptop addresses the needs of power users on the go, video users, those who need peak speed and reliability, and for those desiring a desktop replacement that can also be used while traveling.