Which Neu motor?

Hey everyone!

I was going to start a conversion topic with a light MT. I am going to use the $275 MGM ESC in it. I was wondering which NEU motor would be best for that kind of project on a 5s lipo?? Im looking for speed over torque as I should have an insane amount of torque off of the BL motor anyways.

I guess what I dont understand is the what is a 2f, 2d and the nomenclature of 1515 vs 1512?? Is there a chart of comperable KV ratings for them?

Thanks!