Dual Brushless?

[BrianG]

No experience with that store, but when you buy from Mike, you know he will stand behind it.

You should have both top end and acceleration. Although a 9XL on 3s is only ~20k rpm, but the fact that you are running two should allow you to gear up to compensate. Personally a pair of 8Ls would probably be a better match rpm-wise, but you already have one 9XL...