Brushless Maxx XL2800/7XL/9L

[Nick]

I need to just ask a few questions on the motors since the 9920 is still not in stock it gives me time to pick my perfect motor.

I'm looking for something fast, high 40s.

I don't want insane power, sounds daft but is it possible to reach mid to high 40s with out loads of power?

I would also like 5minute run times...

I will be running 14 cells but hope to upgrade to 16. They are GP3300s with lots of punch and read at 3700+mAh.

I looked at the following all with 9920:
Feiago 7XL
Feiago 9L
Lehner XL2800

Heard alot of good points on the 7XL and I like the idea, where needed I can expand in cell counts, just intrested in its capabilities with 14 cells, quick?

9L I'm not sure on because I don't want to be the same as everyone else, would prefer something different and unique, although it might be the one that meets all my demands?

XL2800 I'm not to sure how many cells it can run, if it would handle 16? 5minute runtimes?

I hope someone can answer a few or all of my questions and that my demands on brushless is not to high?

I know alot depends on how much you pull the throttle and what gearing you use but a general idea would be great.

Thanks alot, :D
Nick.