Here Ya Go:
That's a 162 hp Cooper S.
The trailer is steel in this picture. I was pulling it with a Rabbit GTi (~120 hp) for a few years, even up steep/long hills. Cooper was much better for the power but also it has much stiffer suspension...the nose of the car wasn't pointing up all the time.
My current trailer is all aluminum...but does have a big wooden storage box...so I'm not too sure it's lighter than the steel setup.
Note that the biggest safety concern with this setup is the constant attention it seems to attract from other drivers & their passengers, even on the freeway at 70 mph. People really shouldn't be leaning out windows at that speed trying to take a picutre with a cell phone! At least use a proper SLR & so you can call it "ART" <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />