You are running 4s correct? Why not use the Mamba Max? Out of your selection I own a 9920 and a quark 65. I use both on 5s, and they work fine. The quark is the smoothest, but does seem to heat up more than the bk. The bk has not adjustability or lvc, but seems robust and is very cost effective.
I have a feeling that the quark 80 would be a better choice for your setup. The 65 is a good controller, but more for 10th scale, lighter vehicles. You may be suprised that you lehner will pull more than 55 amps in a larger vehicle, depending on gearing. Why not use the mm?