I know how sound level is measured but when can one say that music or that movie at home or in theater is too loud for peoples ears?

budget is like below $200, my choices at the moment are buhringer ms-40, m-audio av40, Alesis M1 or the Akai pro RPM3. need something with good bass though but aint too big of a size.

With the original Titanium x-fi, does the WASAPI windows mixer bypass work with it? It only mentions ASIO for bit-perfect which from what I read happens to be older and maybe serves a different purpose. Also I want to ask if x-fi mixer only resamples when windows mixer is enabled or does it...