Thanks ren_mem. I did compare the differences and I am still leaning towards standard as I really don't think I would need/use the pro features. They made a couple of the features of C4Pro part of C5 standard so that is cool. I think it will be a great jump going from 3 to 5 regardless of Pro/Standard. I also want to get Hexagon and learn to use that. So I think between the two apps, you have a pretty good set of 3D tools that's tough to beat. Regards, Paul