Why would a celebrity have any bearing on which camera system we should buy?
I was married to Canon way before I even had a DSLR. My first camera body was a Canon EOS 1 given to me by mu aunt, and I got so used to how it performs. Plus, I had all kinds of lenses to go with it - namely the 100mm 2.8 macro, 10-22L (long since sold, I regret it to this day), my current 70-200 F4L, among other things.
You're used to the Minolta, so getting a Sony might make sense for you. You already have Minolta lenses, so they'll be right at home on the Sony. Only thing I don't like about the sony is the built in image stabilization on the camera body.
OR - you could sell all your Minolta equipment, and purchase a Nikon or a Canon. I personally feel that Canon has a better sensor, and better glass, while Nikon has a better "automated flash" system with their SB-XXX speedlights. I think it all boils down to what you really want to do with your camera.