After being a Head-Fier with <all> the demos for a few months now, I've been able to listen to the models without pressure (and under lots of different conditions).
The UE7 as well as the UE4 still stand out to me and I recommend them whenever I can. I know that "top of the line" can be alluring sometimes but these monitors are worth a listen and worth getting. (I don't like the UE5 as much, for some reason they are not quite as "clear" sounding to me...)
I call the UE4 "Baby UERM" and say the UE7 is "also fast and clean like the UERM but with more warmth" and a touch thicker presentation. The UE7 are great all-rounders and aren't peaky or recessed seeming in any area. I would be happy if I only had one of the UE4, UE7, or UERM for my tastes. I keep trying to find a reason to "need" another pair with a different signature, LOL.
At RMAF this past weekend, a Head-Fier that listened to the demos (on several occasions through the course of the weekend) chose the UE7. That was my first show on the other side of the table and I found it best to help based on preferred sound signature and presentation. They are all tuned differently. Start with the UERM, then go a bit warmer with the UE7. Need more bass and a bit of thump? UE11. Even more warmth than the UE7 and "smoother"? UE18. Have to tune your own? PRM. Easiest way for me to explain it.
Sorry for the treatise on all the models here in your thread, but the past weekend helped solidify my thoughts on the differences and the best fit (sound-wise) won't always be the most expensive or have the most drivers. IMHO, YMMV, etc.
May everyone find their sound...