First, do a search on "bike rack" for the bikeforums site. Lots of good discussions. Next, look at a site like http://www.bike-racks-plus.com/

Shows lots of options. Also, in order to have a hitch rack, you have to have a hitch. If you don't already, that could be a big extra cost.

Don't see why a removable trunk rack wouldn't work for you. I think even my Miata could carry a couple of bikes using my Saris trunk mounted carrier.

If you're only driving a few miles, lighter duty rack is fine. If you're driving on rough roads, extended trips, heavier duty (hitch mount, 2") would be better. My Yakima hitch rack mounts on my Durango's hitch and swings out of the way of the tail gate. If you have a non-standard frame, or super exotic frame material, you may need a tray-type trailer hitch mount or roof-top carrier.