hi g
down the road at shadfen just outside morpeth i run the wimo 1090 kit with the pre amp to be honest the pre amp does add a little to the reception but a good clear view and a little height help more.
cant reccomend the rb more highly the benifits over the sbs in terms of support and useabillity are immense the reception capabilities are comprable according to other posts but being computor dumb the plug and play with the rb is great along with all the help on te forum from other users