Hello and welcome! There is an abundance of information available on this community, as well as, the KB, webinar archive, Cambium College and YouTube channel. I'll post some links at the end of this post that may help in the future.
As for your specific question, I would highly recommend using our free LINKPlanner design tool (overview video) to estimate out performance using various products. In general, you are probably looking at an ePMP PTP design (bridge in a box, Force180/190/200/300). Throughput is going to be heavily dependent on channel size and SNR. A 40MHz wide channel will give you ~250Mbps of aggregate (downlink and uplink) capacity, whereas an 80MHz wide channel will be closer to 600Mbps). These numbers assume a clean channel and the Force180/190/200 support up to 40MHz wide channels (Force300 up to 80MHz).
Another low cost option is the PTP550. It actually has 2 radios inside of it, capable of 80MHz wide channels each, for a total headline rate of 1.3Gbps+. With the asymmetrically, non-contiguous channel bonding feature, you can select any combination of channel sizes for the two radios (e.g. 2x20MHz, 1x20MHz and 1x80MHz, etc.). This gives you flexibility in channel and frequency band selection. You can use two 20MHz wide channels now and increase the channel size as your throughput requirements change. Also, the multiple channels will give you better interference mitigation should the spectrum become congested (the radio will change channels to avoid interference).
Here are some useful links:
Corporate Page: http://www.cambiumnetworks.com/
Main Support Site: https://support.cambiumnetworks.com/
Support Community: http://community.cambiumnetworks.com/
cnMaestro Network Management: https://cloud.cambiumnetworks.com/
Webinar Archive: http://community.cambiumnetworks.com/t5/Webinar-Archive/Webinar-Archive/m-p/46088#M77
YouTube Page: https://www.youtube.com/user/CambiumNetworksLtd
Cambium College: http://community.cambiumnetworks.com/t5/Cambium-College/Cambium-College/m-p/69663#U69663
Technical Training: https://www.cambiumnetworks.com/training-overview/
LINKPlanner webinar: https://www.youtube.com/watch?v=zKKR8ek36hE