For bashing, you would want to run a higher voltage, lower amperage setup. This is easier on the ESC, and more efficient as well.
For the castle stuff I'd say a Mamba Max Pro with a 1415 motor. This motor only turns 2400rpm/v but can take up to 5S lipo.
at 5S lipo it would be spinning about 45,000rpm but the torque generated would be insane.
It would move a 4WD short course truck like it was a feather.
Plus it also means the load on the batteries is less as well, because overall current draw is less. And if you really want to go stupid, insane fast all you gotta do is gear up.
I have a Mamba Max Pro and a Castle 1410 3800kv motor powering my OFNA Nexx8 1/8th buggy and while its not uber fast on 4S it certainly moves out well enough. The Nexx8 is a heavy beast though compared to a Short course truck.
Right to Left: Castle 1717 1580kv, Castle 1515 2200kv, and Castle 1410 3800kv.
http://farm9.staticflickr.com/8236/8360790259_a15b196417_z.jpg