Hi,
I would offer this: take a look on Tower Hobbies website at the Sig Sundancer 50 biplane. This is an ARF of top quality and flies real nice and is capable of every trick in the book yet slows down very nice for landing. I have one with a Mag 70 four stroke and it has almost unlimited vertical and very fast top speeds. The only mod needed would be to beef up the landing gear mount area in the fuselage. I mixed up expoxy and poured it in the cavity where the main gear mounts up. No problems. You can find it at the following location. If that doesn't work look on Tower under ARF kits Sport 51 and up.
http://www3.towerhobbies.com/cgi-bin...?&I=LXLCA0&P=0