i would suggest that you go with T300 series (T300S is there too) as its new gen outdoor AP of Ruckus, its an 802.11 AC 2*2 model and better priced than 7762 series.
Hardware is too optimized for current wifi challenges...
having said that does not make ZF7762 make a bad product, just that in today scenario, its wise to go with latest so that ROI is better and will work long term...
hope this helps..