(I work for Ruckus)
I recommend a Ruckus 7762. It is a dual band 11n outdoor AP that can be run in stand alone mode or you can use a controller later if you like. <Advertisement> Ruckus sells more outdoor Wi-Fi gear than all other Wi-Fi vendors combined and there is a reason for it. </advertisement>
Feel free to email me at gt.hill (at) ruckuswireless.com if I can be of any help.