I have a LT-25 with a Saito .30 and it is a great combination. The LT-25 flies on the wing and the Saito has the torque to get it airborne but doesn't yank it around the sky so fast that one is constantly turning. Because it cruises at about 1/3 throttle, it is super quiet and sounds great.

If a trainer is not in the cards, consider bashing the LT-25 kit... do a search here, I've seen a couple of very sporty looking bashes of the LT-25. And... the LT-25 is laser cut with fit that is the best I've built and one of the quickest builds. Because it is all balsa it is light enough to really fly well and yield about the largest plane that one of the small four strokes would fly so well.