............ But the 7D will have it's 4th birthday very soon, therefore I'm not sure if it's smart to buy it, or maybe just wait a little for it's equivalent to come..........
I recall the 7D arrived in november 2009. So the camera will be 3 years in nov. 2012.
I have this camera and I am very pleased with it for any kind of photography.
I would suggest this camera since your lenses fit this APS-C camera.
The possible successor will arrive probably only spring 2013 (announcement Photokina 2012??). That will give you at least 1 year pleasure of this camera. And in case you want to buy the successor next year, you will still be able to get a nice price for the 7D (or maybe use it as your second / backup camera)