Yes, this is what I'd be looking for - I don't mind the noise when flooring it - it is particularly the motorway cruising speed drone that I could do without.
This valvetec thingy sounds interesting. I wonder if Nige @ BCS will have this for a new Octavia when I get it in about 12 weeks??
If not, I will go standard cat-back (as I don't believe that it is a bottleneck) or perhaps the 3" cat-back with the extra silencer