The LA 25 is a fine engine and is not a shaker like a Fox, so it will work well on a Flite Streak. Another fine choice is the Brodak 25. Very nice engine that works great and is very user friendly. The ARFs have fair control systems installed, while not perfect for the seasoned flier for the long term, they usually hold up plenty long enough for the retread flier looking to get some practice in. When you fly good enough to wear out these controls, you will be ready for a much better plane with all the goodies. All of the planes mentioned are great fliers and will allow you to get in the air with little trouble. The LA or Brodak engines work so well with available fuels, practically no break-in, and such east tuning, it's sometimes hard to go back to an old-style engine.