For a $55 product DoodleCAD does a lot. Not only that but it's easy to use - I've never seen a drawing app that allows such natural and intuitive path and shape editing. DoodleCAD has this great feature that lets you just turn dimensions on for an object rather than drawing them seperately. Easily change document scale and measurement units. I just cant say enough.

It's not a Versacad but it's not $600 either.

But why take my word for it - download it and try it yourself - it seems to allow a huge amount of free trial time with no restrictions.