Arduino fio + Xbee

Hello,
I´m trying to create a project with multipoint communication by an arduino fio that uses Xbee communication.
So I would like to know which Xbee modules or series fit best with this board.
Thank you for all.

I use an xbee series 1 1mW chip antenna. It's the cheaper xbee available and works fine.

But, the fio will work with any xbee available.