I recently purchased Modo 302 and from the little time I have spent with it I can say it is well worth the money. Not only does it have the tools that many SU'ers have been asking for for quite some time but us also has a very intuitive UV mappper/unwrapper and does excellent rendering all within the native app. Again, I have not got too far into it I am still going through all the tutorials and manual but they are also developing a Sketchup plugin. Currently it is still in beta and is a but buggy. Once that is worked out I can truly put this into my workflow.
Scott