ORIGINAL: nitro wing
Go 4 stroke, better punch from slow speed and better sound for sure, you may need a .80 - .91 and up to match full output of a good .60 2 stroker. I have no CL experience.
If going RC make it fly true and fun, it does not need lots of power to fly without lines, Enjoy!
I agree with Nitro a 4-stroke sounds like a winner! A Curtis P6E a real beauty!