freebird1,

I think the 475 is iffy on either plane, both have pretty big control surfaces, but it should be o.k. if you are not into radical 3D. I know a guy who really wrings his out using 635's and they have held up to some pretty serious abuse.

Check out the big thread on the Katana in the ARF forum. The first 20 pages have most of the info you are looking for. Most guys prefer using the o.s. 160 w/pitts muff, hitec 645mg servos, etc.. Verify which wing set you get, the older ones need upgrading. Then go have some fun...