Java EE (Java Enterprise Edition) General Discussion

I have been tasked to look for something that will do as much of the below as possible:

Send messages
- send items with guaranteed delivery
- send items with different priorities so that high priority traffic is done first
- with a sensible Java interface for client and server.

Route messages over different transport options
- e.g. over a LAN or GSM / some other network (Mobitex)
- choose the best route (i.e. do LAN if connected or something else if not).


It will be plugged into a system that is made up of multiple clients sending messages to a server (and getting responses).

Looking on the web I notice MQSeries and SoniqMQ seem to do what is required. Does anyone know if they do, how easy they are to implement and if there is any other option I should look into ?

cheers