I have to throw my vote o the Streak Jr. with a .10 or .15 on it. I have an old original one with a Fox .15 slant plug on it. Flies smooth, good tension and manuverable enough to keep her interested.

I also have a Ringmaster Jr, originally I had a Cox Medallion .09 on it and it flew o.k. Thought i needed more power so I switched to a Fox. 15 schneurle. Way!! to fast on 52' lines. I can't imangine putting a .19 on it, I've flown a regular Ringmaster with a .19 on it and it flew o.k.Not fast , and not a lot of vertical - but it stayed out on the lines and did decent loops and wingovers.

The Sig Goodyear Buster and Shoestring are tough,stable, and easy to build. They look good too, with a scale paint scheme.