I think Hexagon is quite useful, but it has annoying bugs (numeric input fields do not work etc.). Hexagon has also cleanest cage smoothing. Silo is innovative and handles impressive amounts of polys easily. It might need some more precision tools. One thing every modeler should investigate is Wings 3D. By far the best subdiv modeler. And it is FREE! How good Cinema is in modeling? I have very old version 6, but I'm not up to date how the modeling side har improved. It has good booleans, but so have Carrara and Bryce... I am novice at Carrara, but I have found splines, booleans and general composition features in Carrara to be quite amazing. I do poly modeling in other apps though.