use of zAAP on zSeries architecture


has anyone experience with using Java technology on zSeries achitecture with zAAP processors. I using a lot of XML wrappers on natural RPC servers, would it be of advantageous to use the XML wrapped code on the same hardware box where natural RPC is running or would it be better to keep the XML wrapped code on a Solaris platform. Suppose a linux architecture is present on the zSeries, where would be the best place for the broker to run, as well ? Take into consideration that EntireX RPC is used in both directions from java to natural and from natural to java.