Originally Posted by
GrumpyDiver
It depends on your lenses; the D50 has a built-in focus motor, while most of the crop sensor Nikons do not and rely on the in-lens focusing motor for autofocus. If your lenses have built in focus motors any of the newer Nikon bodies will work for you, if not, you are going to have to look at the higher end units; the D90 and D7000.
Which lenses and accessories do you have? Wireless remote, again that depends on what you have / use. I use bother wired and wireless remotes for my D90 cameras.