Congrats on getting the 7D - you should like it a lot . I have had that one for some time now and although I usually only do wildlife photography I think for your purposes, you will love it. I have just bought the Mk II - couldn't resist the multitude of focussing options (hope I can handle it lol). Thought I would keep the Mk I set up with the macro and use the Mk II with my longer lenses.
Really lovely shot, I like the colouring and lighting. I have never looked at which camera you have been doing your pics with but if I am right in thinking it was the 450D (from your comment), you have been doing a terrific job with it.