For access points, grab a RB532 part number RB532-4 from WISP Router. At the bottom of the item page you can choose the option of indoor or outdoor cases, use the PoE 48v PSU option (cheaper and more practical), and a CM9 radio card and PT-UFL6-NFB-1. If you buy this way they will ship it pre-assembled.
Also grab a weatherproof RJ45 connector for US$6 to use with the outdoor case, it means you don't have to open the case to install/remove any cables.
If you want to have multiple access points at one site, buy a single RB532 and case and buy a CM9 & pigtail for every access point you want to run. The RouterBOARD can run up to four cards together, although more than two will require a RB502 mini PCI daughterboard.
For 5.8GHz omni antennas, see Dale's website
www.gowifi.co.nz. WISP-Router have nice sector antennas but they are damn expensive. For point-to-point backhaul, the grid antennas are excellent.
For clients I'd suggest a RouterBOARD 112/CM9 in a RooTenna. Choose the u.fl pigtail option for these and they will fit directly to the CM9 card without any extra cables. Bear in mind you will have to mount the RB112 inside it yourself, no provisions for this are included. Once again the weatherproof RJ45 connectors will help save time in the field.
As far as cabling antennas to the access points go, use short runs of microwave RG-8 cable, such as Times LMR400, Belden 9913 or Commscope. You will also need N male connectors on each end. If you intend on setting up a few access points I'd recommend buying a hex crimp tool and making your own leads to suit your installations. Dale sells all the bits you need and is cheaper than importing them from WISP Router.
As far as config goes, Mikrotik has a nice Windows based tool you can use for this if you don't feel comfortable with the command line interface. The web admin side of it totally sucks so avoid using it if possible. I'm happy to help you get it running once you get the gear.