Same goes for me if you get Blender. The GUI is being re-worked and they have exposed much much more of the functionality in the menus (whereas before you just had to know the keyboard commands). Also the feature list is growing day by day. The daily builds also include Yafray (ray tracer) integration. Lots of good tutorials out there and as Axeman said, "practice, practice, practice!".
And as a side note, Blender has a dedicated CAD program in the works (first Alpha release a few weeds ago). I don't know if it will stand alone or not, but I'd be suprised if it didn't work with Blender in some fashion.