As jomlett says, so it depends on what you want to do with your Mac.
Mac displays are excellent, but you do pay through the nose for them (although that comment really only applies when you have to buy a separate screen, say with a Mac Mini, where the choice is between a couple of hundred quid for a decent Dell monitor and nearly a grand for a Mac monitor).
If you're not too bothered by graphic quality, then go for the faster Pro unless the lack of USB ports would bother you. No easy answer, I'm afraid!
BB