I would add that when you get to a certain level of skill you start to diverge in to subcatagories.
So I would add:
-Advanced - High technical ability to include finesse but focused on physical prowess on the instrument like Frank Gambale (or any number of Jazz guys), metal shred guys etc.
-Accomplished - This falls in to a bit of what Slipin was saying. I would not call David Gilmour advanced but he is very accomplished.
Then again, we could go all day breakin' it down this way ;)