Thank you all,
Still I have not decided about selection of the camera.Canon 7 D dslr looks interesting except for over heating in video mode.
However much excited about the show because never seen
a big orchid show.
veekay
There's a firmware fix for the Canon 7D overheating problem. I've installed it on mine though I never had the problem, but the newer versions have it already installed.
The APS-C sensor in your 7D is exactly the same dementions as the Canon T1i (you mistakenly called it the xt1). All Canon APS-C sensors have the same size and produce the same "cropped" (a 1.6 conversion factor) field of view with any given lens. The only other variations to the Canon line up are the APS-H sensor (a 1.3 conversion factor) found in the 1D series bodies ( and then there's the Full Frame sensor (same as a 35mm film frame) found in the 5D and 5D Mk II.
The 7D is a truely nice "mid-level" camera. Probably the top end of the mid-level price structure, but still considered mid-level when compaired to the new 1D Mk IV which retails right around $5000 or the 5D MkII which goes for around $2500. These prices are for the bodies only. The 7D body can be had for just under $1700 new.
Personally I'm still trying to decide which will be my next body, the 5Dc, the 5D II or the 7D. There are alot of things to wiegh in my choice, price being a big one.
I too will tell you to stick with what you have lenses for, but if you really want to change to Canon and the 7D then you will be getting a great camera!