NarbNick

If you raise the speaker the woofer has less bass coupling/reinforcement from the floor so you will lose bass no matter what you do with the base.

No it does not need to be in a corner. I would say the vast majority of CW's I see over the years are not in corners. Any speaker placed in a room corner vs open wall will have increased bass output in the corner so you just have to consider that for proper balance in the room.

It seems like the same pair that was listed a couple weeks ago on US Audiomart:

I've been keeping my eyes open for a set in cherry but here's one in walnut: https://www.usaudiomart.com/details/649598459-klipsch-cornwall-iv-pair-walnut/