I might consider an 1800 kv. As you saw I put a 1450kv with Arrma BLX200 esc and was disappointed with the amount of loss of top end speed with 16t pinion. The stock motor was more favorable too me. I have some larger pinions to experiment so that could change. I have seen Castle 1800kv for $38 shipped from china, or $55-70 on eBay from U.S.