I just went through the same thing as you and from reading on this forum there seem to be a lot of people doing the same thing. A lot of very helpful people in the Mac community. What I done was browsed the Apple website and decided on buying a MacBook Pro. Then went to the local Apple store and looked at the machines and talked to the "geniuses" to see if a 13" or 15" screen was needed for my uses. It was very helpful to have the computers right in front of me. I ended up buying a 13" MacBook Pro with a 2.8 GHz Intel Core I7 processor and 4GB of memory. The switch from Windows is taking some time but it's been fun learning and there is so much helpful information out there that it's not been too difficult.

I hope this helps.