I would go with a H9 Sport Cap. I have one and love it. I have an old worn out Supertiger .45 in mine and it pulls it great. It does not have enough power to hover and pull out but it does have a couple hundred feet of vertical. I wanted to replace the motor with a YS 63 but one of the fellow club members is trying to talk me out of the plane. He wants it more than I do. I am just putting the finishing touches on a Yellow Su-31 so when it is done I will sell him my Cap. I really pushed the limits on this plane this past weekend by giving it huge ammounts of elevator throw and doing very violent snaps with it. I do have a small amount of elevator flutter at high speeds so I just fly it at 1/4 throttle till the nose goes up. The plane will fly pretty darn slow as I was bringing it accross the runway inverted and seeing how slow and low I could get it. A change I would make would be to make the rudder a pull pull for a more positive control. Also watch the elevator throw it only really needs about 1/2" either way. Or it will try to snap out during the pull.

Chris Puckett
Puckett Model Aviation