I would think any of the engines in that class with the exception of the Fuji would do a nice job for you. I'm flying my Pitts with an old Sach 3.2 and it does a great job. I fly 35% airplanes now but the GP Pitts was so cool I had to have one and had the 3.2 laying around so why not. Now I'm looking at the Eagle and thinking I should have one of those too so I'm looking at another 50cc engine. I believe I would go with the DA50 just because of my experience with Desert Aircraft (fabulous service) and the quality of their 100cc twin. Of all the twins I own, the DA justs starts and runs every time and the quality is the best. If you do a search, I believe there is an article on installing the DA50 in the GP Eagle somewhere on RCU. Go DA with the Eagle and I think you'll have a dynamite package.