Greg, if you're thinking of doing more PCB work, I'd encourage you to give DipTrace a look. They have a free version that's good for small projects like this, and it has a really extensive library. The other big bonus is I have found it's very easy to create new parts for stuff that's missing from the library. For the 3D views, you can pick a similar part and very easily stretch or shrink it in any dimension to give you a decent 3D view. I usually get a pretty accurate representation of my boards with the 3D view. This allows me to plan the layout and be reasonably sure things will fit.
Here's an example, my Super-Chuffer II board and the 3D view. The biggest discrepancy in this view is the added socket on the real build, that allows me to easily change the uP firmware without a soldering iron. 
