Roy, you've started it now! It's like buying RIBS. You don't know what you need until you've got one.
Personally, as a long term Olympus SLR owner, I changed to Canon about a year ago and I don't regret it. I have the 350D but there is a new Canon 400D, which supercedes it, with some extra worthwhile features.
I also bought a Sony R1 which is not an SLR and, in many respects, better for it. I use it the most. The Zeiss lens in just outstanding and the camera has features which I've not seen on any other camera. The lens has a zoom range of 24-120mm in old 35mm terms. However, if you need a long lens or you feel you'd like to explore, say, photographing flowers or insects, you need an SLR.
Remember though, the lens quality is all important. If there is loss in the lens, no amount of megapixels and camera features are going to get the image back. A medium camera with a crackin' lens will give a far better picture than a whizz bang camera with a budget lens.
However, it's like buying RIBS, you don't know what lens you need until you've got one.
There are good lens tests on this
site and good camera and lens tests here