Wow...That's a bit of a price hike
I was contemplating stretching for the UHA-4, even though I didn't need the dac, especially with all the love its been getting. At that price point, it's still a good deal for features like crossfeed, but I'm not confident enough yet it's the best for me. I agree with the above comment about the P4; I don't know which of the two is better, but I'd do even more reading than when the UHA-4 was $170.
I'll be excited to read more about the E11 and see if its even in the same class as the UHA-4, especially for iems.