What are some cello pieces for me to learn?

I've been working on Bach's cello suite 1 prelude and pretty much have that down (though not perfected) and I played C. Webster's Scherzo as a solo piece for NYSSMA this year which was INCREDIBLY easy. I have been playing for 5 years and I am 14 so not something too difficult, but a piece that has a difficulty of in between those two pieces (maybe leaning more toward Bach's piece though) would be perfect. Thanks. :)