I'd second that - at least check them out.

I tried a Rainbow, and just never got the warm fuzzies from it. It was well-designed, roomy, and well-built, but it just didn't trip my trigger for no particular reason I could put my finger on. However, I wouldn't hesitate to recommend them to anyone considering a lightweight tent.

Also, if Franco's saying the Scarp is a 4-season tent, trust him - he's got pretty good judgment.