Yes the hobbywing 60a esc is good,
There's links to a motor and 2.3mm pinions for the leopard motor the pinions won't fit on stock motor, if you do go for this high kv motor i would strat with 12t pinion maybe go to 14t if there are no issues.
I run these leopard motors in my gtb, if the 2838, 5200kv version fits which they have then that is a cracker the pinions are 3.2mm for that, i run that in my emb and have one to go in my mini 8 i just haven't got around to seeing if it fits straight in without mods i also have the exotec chassis for it but haven't got my arse in gear to fit that either lol
The pinions i linked to you won't find cheaper anywhere else bit restricted though if you want to go higher than 16t.
http://www.smartteknik.se/uk/brushless-motors/motor-lbp2435-6600kv-4-polig.html
http://www.aircraft-world.com/en/p1071673-hp-pin05
Si