performance potential w/ 6s lipo?

[BrianG]

Another benefit with going with higher capacity cells is that the voltage will most likely drop less under load. If both the 5Ah and the 8Ah cell are rated for 20C, the 8Ah cell will be able to deliver more current. If both are pulling 100A, the 5Ah cell voltage will dip more because you are running at its max rating.

If you are running 6s lipo, I would go with a 10XL. The 7XL will be MUCH too fast and hot and you will probably end up burning it up. A higher wind motor can go just as fast, but you might have to gear up to get the speed you want.