What cross bike did you have? Seems that a disc cross bike with slicks and mudguards would be appropriate?
Tom I have a Cube X-Race comp, alloy frame, carbon fork and 105 with canti's. At the moment its fitted with Schwalbe Marathon Supremes and mudgaurds, even with the 35mm tyres its not very comfy over any great distance. The idea was to buy a new frame and use the Cube as a donor, wheels/drivetrain. I'd then strip an old Allez I have and rebuild the Cube with older 9 speed parts and just use it for cross.
I've been going round in circles with this for a while and I'm now thinking I'll just fit some crud racers to my Planet X SL and but a whole new road bike next year.