If you already answered all the questions about environment, noise, distance, fresnel zone, local law requirements and others, then you can use whatever 5GHz device with dual polarisation, starting from sxt lite 5 for example. If it will fit depends on the topics I mentioned above.
Yes! Its possible. but if you can wait will be better because Mikrotik now is supporting 802.11AC and soon they will have a good 5Ghz 802.11ac outdoor products and you can use it for PTP with more than 500mbps throw-put