Shame that there is not a hidden spot for sub. That would have been ideal.
From a performance standpoint, the EMPTek are the right height, as the tweeter should be close to ear level. Since they have an MTM design, the mid on top adds extra height. At 8.5" wide and with the curved walls, they are comparatively svelte. I don't think the height is near as important as the width for being imposing on the room. I think if she had them in the room, she would not be that upset.
The HTD 3 specs 30Hz-40kHz without telling you if it is +/- 3 db or +/- 10 dB. They have a decent reputation, so I am sure they sound pretty good, but for bass, I would want more info.
I would cross the Verus Forte off of the list. With 4.25" woofers, you won't get decent bass at all. they were clearly designed for use with a subwoofer.
If you can swing the SVS Prime towers, I think that is the best option. I have not heard them, I have only heard the Ultra Bookshelf speakers which were excellent speakers. The measurements from AH are better than the EMPteks and I'd to bet they sound very good.
http://www.audioholics.com/tower-speaker-reviews/svs-prime-tower-and-center-loudspeaker-review
Moreover, the SVS has a 45 day return policy and
they will pay for shipping both ways, so if you don't like them, it doesn't cost you a dime. Give them a call, you will be amazed at their customer service - you will get intelligent assistance and reassurance on the return policy terms as well as feel good about buying from them. You can also ask about any B-stock. Hopefully they can tell you specifically what blemish (if any) exists.
As for rear porting, one of the articles here on AH recommended no less than 1.5 times the diameter of the port so you are making that part harder than it should be - call it 6" and you are good.
PS I have no experience with Chane or Monitor Audio, so include that when considering my comments.