I bought this:
(Link Removed - No Longer Exists)
I wasn't going to pay $300/$400+ for a light weight bicycle rack. This works great for my RR. I did a little bit of modification. Moved/removed the cross bolts for better tire fitment. Had to drill two additional hose for a fitment that suited my aesthetic . Your requirements may vary.
Yes, I know, fits only one bike. But I'm a solo rider and it suits me.
I've covered over 2000 miles without any failures. It's built like a tank. I used the ramp once or twice. However, I find that I can lift the rear tire onto the rack first and easily lift the front tire into its place.