Sarah,
Don't look back. Enjoy what you've got and don't be scared....just have fun and experiment and play. I have both Cannon and Nikon and my Rebel XT keeps up well and there will always be more mps but just how big are you printing anyway??? Like Pattie said, the next thing is your lens wishlist and supply. Just remember it's not the camera it's the shooter and how you capture. The technical part is second. The group here really is helpful on specifics so you're in good company. Keep that trigger finger going.