I'm thinking about adding a third SW to my system as I already have Dirac ART and I could benefit from it. At the moment I own 2 SVS SB-3000, which a great, but I would like to try go bigger. My room is open space and pretty big, so 15 inch should be an improvement. I usually listen at 75db, sometimes 80 db. What brand is considered the best value in Europe? I would love to get Rythmik sub, but it's not available in EU. I got my SB-3000 for a great value, ~1350 Eur, but beefier SVS subs are pretty expensive. What are my choices?