I highly recommend both C4D and Modo. if you max out at under 1000 I would give Modo the edge becouse it has a really nice renderer that comes with it. Modo is an amazingly flexible modeler with high precision and extremely customizable tools. one thing about that though is more flexibility means more complex to learn all the ins and outs. getting the basics doesnt take lots of time, but really being able to take advantage of how flexible its tools can be can take quite a while. its got great uv mapping tools, and includes 3D paint tools and 3D sculpting tools. (though those tools tend to be limited by how good your graphics card is). and it preserves all .obj grouping. Cinema 4D is fast, easy to learn and use, and now comes stock with the probably the best 3d paint software on the market Bodypaint 3D. I do highly recommend using spankies free Riptide plugin with C4D becouse C4D's stock importer exporter does not preserve both material and bodypart grouping, also you can get point order issues when importing with the stock importer which would cause issues with morph creation. Really there is no reason not to use Riptide, just use it as a replacement for the stock importer exporter, thats what I do. C4D does not have any true displacement sculpting tools yet though, and to get all the features of C4D such as dynamics and strand based hair and the advanced renderer you have to purchase either a package or fairly expensive modules. I dont recommend Rhino, its more of a nurbs modeler which doesnt offer really clean meshes or easy ways of reducing polycounts. Hexagon is a solid easy to use modeler has one major drawback in my book, the lack of group support, so grouping needs to be done outside of hexagon. otherwise I would use hexagon more as I find it quite quick to build meshes in. Zbrush is an amazing tool with a frustratingly non standard interface. its not really a true modeler though you certainly can build really nice models in it. the reason I say its not really a true modeler becouse it doesnt have the many basic modeling tools it takes to build anything you can think of, like I wouldnt use hexagon to build a Car, or any kind of machine, it just doesnt have the basic tools for that. though the tools it does have are mindboggling. I tried Silo a while back, it seems to be a very capable modeler with a few really stand out tools, but it wasn't polished enough for me at the time. occasionally spitting out .obj files with strange defects though I have been told that it has overcome that problem.