I rented both cameras with a few of the new lenses from my local pro camera shop, didnt cost me a whole lot, and I was able to try both bodies, with different lenses side by side. Then I was able to d/l the images to my laptop and see just how different each body was. I decided for the money, the extra 2 fps wasnt enough to justify the extra cost, not when I could buy my 28-135 IS lens for the extra cost. The point being, I would rather have better glass than a better body. At the rate of new technology being introduced, the bodies will always get better, but most quality lenses will be used for years.
Hmm I wonder if I can do that as well at the camera shop.
Good point on the extra 2 fps
I could also buy some other accessories

& MKII-N 
