Hitch: the "standard" ones from UHaul, etc., are fine, but they will hang down pretty low. The fancier (but way more expensive) versions integrate the hitch into the bumper.
Bike Rack: You should at least look at the kind that attach to the spare tire. They seem convenient and relatively inexpensive. The big trick with bike racks these days is that so many bikes have "weird" tubes that make it tough to hang them on a rack.
Bikini and cover: Bestop calls the rear cover a "duster." You can combine it with a Bikini and a Windjammer (part that goes vertically behind your seat) to make a pretty slick halftop. That's just what our company offers. Obviously there are lots of oter great choices out there. It's part of the fun, getting your Jeep customized exactly the way you want.