Go with the Tekin 2250kv motor. It's the only Y wound motor in that range for the truggy, and star (Y) wound motors are more efficient, and respond better to boost. I use that motor in my D8T with an LRP iX8 speed control, and it makes amazing power, is very smooth, and stays cool. I use 14/50 gearing with a 4.3:1 diff ratio, and the truck is phenomenal.
Team Orion also makes a series of truggy motors, and personally if you didn't want the tekin, I would consider one of those over anything castle.