For a certain long period I maintained a website on advice for German students wishing to go to a British Public School, however due to my job taking up most of my time I am now not anymore capable to do so.
I am still very happy to recommend my old school - Lancing College (http://www.lancingcollege.co.uk/). Even more so since they have risen in the League tables to levels quite unimaginable during the time I attended the College. So if anyone is interested in joining the College, I am more than happy to provide information.
I attended it from 1997 - 1999 after which I gained entrance in Oxford to study Maths. I still maintain good links with the school and some of my old teachers, so I don't claim to have an unbiased view, but can say that I think one is getting good value for money there, in particular if one doesn't want to subject one's kids to a total drill like the one pursued at the top 20 schools. Situated right at the south of England up on the shore it also has a chapel which is widely known and simply beautiful (and great to play trombone in, which I did on several occasions back then).