Sorry for the delay in replying, been manic!
When I had the CTM100 I gigged it with either one or two Barefaced Super Compact cabs or an Ashdown VS212. All these cabs are quite efficient, but I never had a completely clean tone (nor was I aiming for one). Two Super Compacts was the best though in terms of volume and clarity and I would dearly love to have that rig again. One day maybe...