My wife and I rode our 07 SEUC a little over 160 miles yesterday, mostly on back roads. I had Progressive 440HD's 13" installed in the rear and the new standard length Monotube System installed in the front. Two up I noticed more improvement than I had solo. It was night and day. We rode over a set of railroad tracks that we cross all the time and my wife mentioned it was the first time she did not bounce in her seat. The bike handled so much better, even on rough roads. I was wondering if I should upgrade to the new frame, I am now completely satisfied with what I have, not saying the new bike is not better, just that this improvement made me that happy. The only negative that I have experienced is the legnth of my front forks, it seems that my front end sits about a half or quarter of an inch lower in the front, Progressive should tell folks that there system lowers the front end a little bit, one other guy that installed the system mentioned the same thing.
Scott