If you havent already, it is worth checking out 'OnShape' (www.onshape.com)

Essentially it is the same founders that started Pro-E who then left and founded Solid Works and now launching a new company OnShape. Key to its features is that it is web based, and is setup as community 'sharing' philosophy. The basic CAD function is parametric and handles pretty much anything the others do.

It will not surprise me in the least if they end up eating the SolidWorks market share, same as SolidWorks ate ProE

Free for educational use (and maybe hobbiests). Personally I like it better than Fusion, and feel it is quite similar to SolidWorks. Sketchup I just never put the time in coming up the learning curve on with these other tools available.