How important is bass to you?

Inna,
I think most responders will agree with your preference. Bass is important as are all the frequency ranges. We want them "all" to be good. Given the context of the question,I place more importance on midrange than I do the bass region. If your question is meant as a hypothetical pick or choose compromise, I'd choose good bass with great midrange rather than great bass with good midrange. I may be in the minority.

Tostadosunidos,
In my area Ifrequently visit jazz clubs that rarely boost or reinforce the sound. It is a pure acoustic sound. The stand up double bass has a beautiful tone, bloom and warmth. Actually a number of speakers/home systems add more bass energy than I hear live from the real instrument. With home audio systems one can have too much bass as well as too little if the reference is unamplified bass.
Charles.