Autocad , Alibrie and Rhino (I did download a copy of V3 it has improved much from when I looked at V2) are great software.If you could justify the cost for a drawing package and a cam package.
But dose the person starting out need to spend all that money. when they don't even know 2d.
Take for example the post from the other day. It was (maybe) from a 14 year old. By the time this kid even understand 2d and use it he'll be more like 17 years old. Why buy any 3d package. But the person who knows autocad why buy something like sheetcam when you can do more.This is what I like about software like Bobcad and onecnc you get both without spending an arm and a leg.