Thanks for the responses. I've decided I'm going to Barbrook & Seven stones of Hordon Edge.
I live in Wolverhampton, and I think that Derbyshire may be the nearest, richest vein of circles and sites to me. I've just bought the 'Rock Around The Peak' book from Amazon- any book title that mixes Bill Haley with Megalithomania is worth eight quid of my money! ( erm . . £7.95). Should get it before my visit.
Excited now!!!
Thanks Stubob & G x