Whats the difference between the 340 and the 170? From what I have heard the 340 can get louder and has more bass, where the 170 may have a bit more level frequency response. Is this the case? I dont plan on listening to anything above 90 db for any real amount of time, and I will never be more than 2 or 2.5 meters away from any speaker, so I dont think I would be anywhere near straining them. I will be getting a subwoofer, so the extra bass isnt that important.