My girlfriend's 5'2" with a 30" inseam (I think...). I'm looking for motorcycle choices for her. She's a real little thing (and a sportbike nut

), and I'm worried that she won't be able to find a bike that she can comfortably ride. I want to find something for her that isn't rediculously small, isn't incredibly expensive (used value), and powerful yet not too powerful - She's only ever been a passenger before. Her birthday is coming up, and I want to pay for her to take the MSF course, and be waiting there with two bikes (his and hers), should she pass.
Could anyone make a recommendation?