What is everyone using for backhaul to micro pops?

We are designing a completely new system using A5-360s as the main AP solution. This is in a small town/suburban environment with very little interference. Obviously, we are trying not to saturate the 5 Ghz band by using all B5 backhaul. There will be some 24 Ghz units used for connecting some main towers, but most of the options we have looked at to connect the micro pops have issues.

We are looking at using probably B5s on DFS in our more rural locations and 11G (B11) or 24G (AF) radios in more congested / higher traffic areas.

http://www.ignitenet.com/products/metrolinq/ for PtP between Micropops