BL Runtime Setup?

[Rannick]

Hi, I'm pretty new to RC Monster-Trucks. As my freind buyed hisself a Revo, I was very impressed and so I was thinking about to buy a Revo on my own. Only Problem I don't like Nitro cause over here in Germany u arent allowed to drive a nitro outside a official race-track.
So i thought about a electric version of the Revo. Then I saw The BL Revoxx from Dafni and was very impressed.
Now that i want to build one BL Revo on my own after Dafnis example, i have a question refering the runtime of a Bl setup.

What is the best BL setup to get a great runtime with the Revo. I thought about a Lehner Basic 3100 or 4200. Has somebody some experience what runtimes are achievable?