I own a both a Roubaix triple and a Sirrus. Have been riding from the time I weighed in at 380 down to 280 lbs(6'1"), both bikes have served me well as they are very comfortable for my 50 mile rides. I live in south Florida and use the small ring on triple quite a bit climbing some of the bridges we have here , you'll be happier with the triple.
Since getting the Roubaix I now use the Sirrus for commuting and just riding around. Keep both if you can, its better to lock up a Sirrus outside while at the supermarket/gym then the Roubaix. I did get a mountain bike for when I have my kick some dirt mood's.
Like posted above, change the wheels I had Mavic open pro's and went with Kyserium's elites. The originals were always needing to be trued.
Last edited by speedxl; 12-17-08 at 12:20 PM.