OK, I got the Unisounds (it IS the AU265S model) Saturday, have only been able to get ~10 hours on them.
VERY promising. Punchy and dyanmic, they benefit from placement (near room boundaries, or in my case, on top of a small tower speaker! The resonance of the tower speaker adds a good bit of dyanmics to the bass, without it being too flabby).
Apparently, the 5" driver is full range, with the Vifa tweeter crossover being minimal (cap?) [DUH! Already posted this abive!]. Pretty seemless integration IMO. Mids very nice, maybe a tiny bit of warmth on female vox - this could be from them sitting on other speakers, too.
Right now, there's some extra sparkle in the highs - not a sibilance, and not artifical sounding. I expect this will ameliorate with burn-in.
I also ordered the ELT-525's, due in this Thursday. Hope to get some time to do an initial comparison this weekend. We'll see if the wife let's me
If you look up member fritzspeaks on Audiogon, you can ping him and tell him I (Todd from Massachusetts) sent you. He still has some of the 5" in stock, and also the 6.5" driver model, too (AU162 I think). The larger model uses a regular crossover, but he was very impressed with the quality of parts and drivers, so instead of tweaking them, he kept them as-is. His words (paraphrased), but he seems very honest and just LOVES this hobby.
EDIT: BTW, I have owned 4 Tripath amps int he past, and heard a couple more. I had SI T-Amp v1, Trends 10.1, Winsome Mouse, and Panasonic XR-25. I have also owned a Sharp 1-bit digital system, and now own a NuForce Icon. All have been great for the price, with my favorites being the Mouse and Trends. I haven't owned or heard the KingRex, but have read very good things about it, especially with the separate PS. If it carries the same Tripath signature of sound I've heard from others, it couldmate very well with the Uni's. The AU265S's are a 4-ohm load, though; the AU162's are 8 ohm.
Anyway, some pics of the AU265S's (from Fritz):