PCRIDE - The 7D is a good camera, no doubt but once you've tried full frame I dont think you could go back. I'm not really a believer in pixel peeking to get an idea of the quality of a camera - I think you need to look at the whole image and you'll just get a better "look" from the 5D Mark II - it's full frame - you get more light on the sensor.

See if you can try both for a few weeks. I remember when I had my 7D, every time I checked my photos on my computer I was always a little disappointed they didn't quite have that "look" I was going for. Every time I check out my 5D pics, I always think what an amazing camera it is.