Dude, this is your opinion. You like the MP more than the iMac. That's cool. But plenty of people (both "consumers" and "professionals") use iMacs to do Real Work, and are perfectly satisfied with them. You don't have to upgrade them yearly; I suggested that as an option. I'm not sure why this has to be some sort of pissing contest; use the MP all you want. I'm recommending the iMac.
I tried going with the iMac for a while. I found that I could only get around 6 months of use out of them before I started feeling constrained by them and was in need of the newer model with more power.
After going through a few more iMacs in less than a year, I finally gave up on the iMac upgrade cycle, and decided to try the Mac Pro.
So far, I'm still very satisfied with the performance of my Mac Pro. If I'd gotten another iMac at that time, then I'd probably be looking for another new system already.