The unit is great, but I still have some wishes for things that are missing in 1.03's track selection/display and visualization interface.

Like what? Often, new users will wish for a feature only to discover that their needs are met by an existing feature that they didn't know existed. Give us some examples, we'll see what we can do to suggest ways of doing certain things.

Can anyone suggest some good online locations to purchase 2.5" drives?

Pricewatch.com, just like in the FAQ.