With that short of a link, go with 802.11a. Less interference and tighter Fresnel zone.
As far as recommending equipment, the tests and program is vendor neutral, but if you have recommendations, feel free to shout them out. You won't get "in trouble" at all.
The first respondent spoke about WDS mode, which is basically a repeater. It is highly recommended that you not use that. You will lose at least 1/2 your throughput with no real advantages. WDS is not designed for point to point connections. You will be doing bridging.
Let us know what happens. It is always good to have real world scenarios on the forums.