Mac Pro?

Well today I spent about 2 hours at the Mac Store in the West Farms Mall trying to get as much info as possible on the iMac and the Mac Pro. Yes, I currently use a PC (please don't tell anyone!) and I've finally decided to switch. The one factor beside all of the other obvious advantages that put me over the top, was for $99. I will get a 1 year, 1 hour a week, one on one class on my Mac with a "Mac Tech" at the store. After all, I think fear was the only thing in my way to begin with.
So now to decide, iMac or Mac Pro? Well, for the future en devour of my business, I think I would choose the Mac Pro, how ever, at $4,600. It's a little hard to swallow. I know it will be better in the long run so I will probably ignore that screaming sound that is coming from my wallet when I say $4600 DOLLARS!

Anyway, If anyone out there can shed some insight on the matter, please do! It would be much appreciated.