Whose been the name most often mentioned for awhile? Ubiquiti is a pretty good dollar value for what you get. But depends not only on bandwidth but sessions, too. We had some problems once bceause I think it was too many streams going over one connection. Based on that experiance I don't try to push more than 4 or 5 camera streams over a link, aggregate, depsite what total bandwidth might be.
Hautespot may be an alternative worth looking at, though I never used them before.
Try Korenix Jetwave wireless APs or radios
PTP radio, we have been using since they were released with great success...
There are also PTMP radios, without more information I can't recommend which antennas to use but here are the radios.
Did you try asking FluidMesh for better pricing?