We booked them by using gigmasters.com . They were easy to work with, we told them the selections (and they even did a special arrangement for us for $50). My husband has a music degree and works in the professional audio industry, so this was a big deal for him – and he was very impressed with them. (I was as well, but missed half of the music since I didn’t hear prelude, etc.)
Click on each tool to see a sample.