I have Wings3D and Amapi 6.1 which have been modeling in. I like them both as they each have their own capabilities. I have Truspace 3.2 but haven't really used it, the interface seems awkward. I just purchased Carrara 5 and Hexagon 1.2, waiting for the 2.0 release. I have played around a little with both of these and am pleased with the purchase. If you have used Amapi then Hexagon will seem familiar to you as some of the features are similar.