Hey guys. I'm new to photography and don't have my own camera yet, I've been using my dads Lumix FZ30. I'm trying to choose one of three cameras that I've been looking at, the Sony Alpha A100, Canon Digital Rebel XTi, and Nikon D40x. I've read many reviews and they all have similar specs and ratings. I'm really having a hard time deciding which would be the best of them. Any input from you guys would be great, Thanks.