The OS .91 flies the UCD .60 Well. The Saito .91 works well on the harrier, the Saito 1.00 on the UCD .60. The Extra 300 would be awesome with the OS .91 or the Saito 91 or 100. I don't have any personal experience with the other two planes and never really been willing to spend all that hare earned money for a YS, but hear they are awesome as well.

Hope you get allot more replies for the other planes, all are really decent planes to fly in their own right.

Happy Landings.