I have a HiMax 2025-4200 with D gearing but was thinking of going to an outrunner. I also have a Little Screamer PP(****) but I think it may be too small, thoughts?

Which is suggested? Billy Hell has one that looks cool. Also I wanted to know thoughts on the HiMax 2812-0850? I heard the Hacker A20-20L was awsome, but the shafts bend easy. ANY suggestion would be appreciated.

I have a Katana and edge 540, both the pro kits.