If you want an even, linear response, get multiple subs. I would go for the more affordable ported subs from SVS or Arendal. 1723 1v or 1961 1v, or PB-2000 Pro or PB-3000. Get multiples, and get a measurement microphone to find out where they work best. Forget the studio subs from Genelec or Neumann, they don't dig deep and are not a good value for the performance.