If I can just add my 5 cents worth. There is a place for both the 7D and the 5D (classic and 5DmkII). [How diplomatically started, right]
I've used full frame and APS-C. For me, at this stage and my style of photography, the 7D suits me best. I really appreciate the AF improvements (over my 350D). I'll acknowledge that the 5D's focus is above that of my 350D.
However I even still use my 350D - eg when I really need something light, and I will pack my 18-55mm kit lens, and still achieve great photos.
But for anything sports, moving, macro, etc- my 7D comes out first. Also, I'm very happy with my 7D for landscapes at ISO100, or ISO200, and for low light photos, I do like the 7D's ability and handling. With some careful post processing, I can get images I am thankful for.
Definitely for landscape a 5D or 5DmkII with the FF sensor is most suited for most of those general 'scenic' applications. Though - as I wrote in another post - unless someone's pixel peeping, often it's hard (or impossible) to tell from normal viewing distance if a certain photo was taken with FF or APS-C.
All the best to everyone!