Do Not get the DV8R. Bounce on landing is a hassle, and fixing broken landing gear blocks a pain. The boomerang is a great kit. I didn't like the looks of the sprint, but bought one anyway! 100+ flights later, it still was one of the best flying jets I've owned. I have 2 Elans now. I have modified mine and add tail cone/ exhaust pipes on mine. Looks way better than stock. (?if you go to Larrys website, he's got pictures). Engine wise, I would recommend a kingtech K-100 G. Bullet proof, easy set up, and run great! Turbinator is another good choice. Hope this helps!