Hello, I am a Belgian car enthousiast and I own an Octavia Rs since december 2013. My German isn't great (I can read it perfectly, but writing is more of a problem) so I'll try it in English.
I've been following this thread for quite a while. My Rs (combi Tdi) has been lowered with an Eibach Pro Kit since january. I drive it on 19 inch 8j wheels with Dunlop Sportmaxx Rt in 225/35/19.
I'm pleased with the result, although it stands a bit higher in the rear than in the front.
Pics:



I really like the way it drives: not to hard and very responsive.
Someone on the Dutch forum has combined a kit with Eibach springs himself (in cooperation with the importer) and the car is then level front / back (lowering 1,7 cm).
I like the way mine stands and drives, so I don't want to change anything.