I'm running the Astro 020 803T with a 13T pinion on my Rex. I have no bogging and have atleast comparable power to my Raptor 50. I expect the motor to last a very long time as most Astro motors do. The 430L is a bit more powerful and less expensive, but has quality issues. The end caps come off on some of the previous gen 430L, gold caps. The silver cap'd 430L supposedly has resolved that, but I still don't trust Align electronics.

The Medusa research motors are reported to be very good as well. The 28-032-3400 seems to be the most popular, and can also be run on 4S li-po's should you ever choose.