Start by crossing off your list all speakers less than 92dB sensitivity.
My Mirage M3-si speakers have 83dB sensitivity and I drive them just fine with 110 watts. I like my music very loud and of course accurate. The same amp driving the Klipschorns (105.5dB) will easily reach unsafe levels. Either setup is backed up by a 1250 watt 18 inch sub crossed over at 80Hz.
OP you say that "good bass is important" but I'd say good deep bass is necessary regardless of music choice. The last octave is the most important ;-)
Sometimes I setup the sub with a very small pair of Mission bookshelf speakers to trick people. They are astonished that the sound is not coming from the big speakers and sometimes have to check. So I would say don't make the decision based on mains bass extension, they probably should not be trying to reproduce much under 80Hz.
Given that you cannot listen to the speakers I agree with others that you should concentrate on reviews from higher end reviewers and ignore speaker specs - most of which are provided by the marketing department.