The one caveat was that at the demo, when I played a bass-heavy electronic track and pulled the volume up, the bass started to get flabby and the port started "huffing". I don’t know if that is the technical term, but it felt like the speaker was losing grip on the bass and starting to lose control of the lowest frequencies with the synthesized bass jabs losing their timing. The track was Algae & Fungi, Part I - by Biosphere from the album Cirque, in case anyone is interested.
And when you pointed that out to the salesperson he/she said what?
Was it the fault of the speakers or was it the fault of the amp?
Did you try the speakers connected to another amp? Same results?
Will the dealer let you take the demo speakers home on the weekend just before he closes for the day and bring them back on the morning of the day he reopens, so you can hear them in your room connected to your system? Many dealers will write it up as sale with a note on the receipt saying full refund on return if returned by (date) in the same condition the speakers left his store.