Fiegao, Medusa, or Novak , which would be best?

I really need to figure out a Motor for my Maxxslash. To the best of my figuring it will come in at around 7-8lbs. I have a Quark 80b esc that I plan on running on 3 or 4s. Only looking for around 45 mph. Unfortunately price is an object.
So my choices I'm debating
Kershaw Revolver/Fiegao 9-11L , or possibly 8-9xl, $60
Novak HV6.5 $65
Medusa 36-50-2200 $90
Medusa 36-60-3100 $100
I'm also open to any other options I might be missing.
I'm not totally sure if the 50 would be enough, nor am I to happy with the 3100's kv.


If someone had a 36-60-2000 that they wanted to part with, I might be interested.