Tony Rice. Nuff' said. Tony definitely put the Blue in Bluegrass. He also put the Blue and the Jazz into it, and even into fiddle tunes. Check out Tony's arrangement of Salt Creek here and see if you can work it up to speed. I don't know if you knew this, but you don't have to learn songs at light speed! You can learn it slow, then speed it up as you get comfortable with the melody and start to develop some muscle memory(which works better at slow speeds).