How big and what quality are your catalogue pictures going to be? Glossy tabloid size? Newsprint 3x4"?
Unless you are going for very large, very high quality, just about any current digicam 3Mpixels and up will likely do the job for you - given it has a remote. And there are aftermarket systems for remotes - see the Remote Control forum here for some ideas about that.
So I'd suggest picking the camera on the basis of what other things you want to do with it. Low light? Good burst? Small size? External flash? Long zoom? Wide angle?