Going from an Estarter to the little Ziroli AT6 is like going from a soap box derby car to an Formula 1 racer. The one I saw, flown by Nick Ziroli Sr. himself, was a rocketship. Flew at Warp 9.8. IIRC, it ended up cartwheeling down the far side of the runway. Remember, this was at the hands of an extremely experienced pilot...

Take a look at the stuff offered by www.mountainmodels.com for some nice balsa kits. They'll spoil you with how easy they build and how well they fly, from what I've read.