How about like the aluminum hard top for my Cadillac Allante Roadster. You can use a lift, but I just get my wife to help me throw it on. Being made of aluminum, it isn't very heavy at all. Probably under 100 pounds.

Making something similar for the XFire would likely cost a bundle. I say that because of the way the header is made and there is no good place, in my judgement to add a top pull down latch on the rear deck. I assume that we are talking about a one piece hard top as a folding hard top would likely cost about what the car is worth.