the GP version is the way to go, it has all the correct built in measurements for engine thrust angles and correct wing incideance.

But hey, it's a hobby. Try whatever and let us know your experance. I just never hear too many sucess stories from "other" brands.

I have a the GP version and built it with a OS120 Surpass 4 stroke, Find the review here on RCU and you will find it useful for building procedure and landing hints.

I learned to join the wings last, not first. and land with throttle, not eleavator. You'll see

Good luck