Best Neu motor choice.

[FG101C]

Hey guys, I am converting my Losi 8-T. I will be using it to race 20 minute mains. The track dose'nt have any long straights so top speed is not an issue, does have some short run-ups where I will need good punch. My plan was to run a Neu 1515 1/Y/F on 4S Polyquest and MMM. I have a 13 tooth pinion and a 16 tooth. I am ready for the motor, but have no idea when they will be available. Is this even the right choice or should I go with the NEU 1512 2.5/D/F? Or the 1515 2.5/D (it's in stock)? OR 1512 1/Y?

Thanks for any help with this, and if this has been covered before I'll apologize for not using the search function ahead of time.