choosing a shield

If i were going to set up a communication between two xbee's (series 2) what shield should i get? Is there a better long distance communication system for arduino?

A safe way for long range, easy to use (serial inerface) is the APC200.

I was thinking bigger range like the xbee pro

http://www.rcgroups.com/forums/showpost.php?p=18523310&postcount=843

I've got a program (for setup) to replace "rf-magic" It is if one om my posts on this forum.

what is the range of that?

I have used this tranceiver an a "CanSat". Senders antenna replaced with a 17 cm,single wire, antenna. Reveiver used thap small whip-antanna. No problems at 1200m+