Hi, which is better?

Depends on what you are using the camera for.  The 7D is basically a pro model with an APS-C sensor.  It is weather sealed and is much better built.  With that comes added weight and size.  The 1100D will take great photos, but doesn't have as many "pro" features.  If you plan on staying in "P" or "Auto" mode most of the time then you might want to get the 1100 and use the extra money for a flash and better lenses which will make a much greater difference in photo quality than the camera body.  If you are looking to learn about photography and perhaps take it up as a profession, then look into getting the 7D, or better yet a used 5D Mark II.

There is no comparison between a "Rebel" series and the 7D, which is strictly in a class by itself. The 7D is utilized by lots of pros owning the 5D and/or 1D, because the 7D offers features that even the other two very repectable 'pro' cameras even do not offer.

The newest Rebel models have most of the features, but, not all that the 60D offers.

Are you kidding? If you have money, go for the 7D.