As stated in my opening post, we are restricted to 4s Lipo
Ahh, must've overlooked the bottom part.
The 2000KV 60mm is the highest KV you can get in the 60mm, you'd have to go up to a 70mm for higher. If you can get your hands on a CC 2650 that would probably be just right.
All I ever wanted was an honest weeks pay for an honest days work.