I picked up one of these for the winter -
Blue PRO-secco
Got it from their ebay site and they took the offer of 1200.00 for it and ebay had a sale of 15% off up to 100.00 so I got it for 1100.00
RBP had really good service. Frames good enough. Itll fit at least 40mm if not 42mm tires on it. I threw 32mm tires on it and its has room to spare. Havent beat it up enough yet but for 1100.00 Im not worried about it.
i emailed Blue and they said they would warranty the frame and fork for 12 months and to let them know if I had any issues with it.
There is a thread on this bike over in the cyclocross section.
-Sean
PS - Sorry... noticed you wanted steel or aluminum. Its Carbon fiber. But for the price you could sell the carbon frame if you feel like doing all the work...