Yeah, I have a UA Dream 65 and it's great into an FRFR or PA speaker. It has built in impulse responses for cabinet sounds if you are going FRFR/PA and that is what I use, but you can turn those off if you want to render it through a real guitar cabinet. Noting that as you weren't specific about the 1/12 or 2/12 cabinet and whether it's going to be some sort of FRFR thing or a real guitar cabinet. I'll send a recording via PM so you can hear what it sounds like going the FRFR/PA route using the built in impulse responses.
I haven't tried an Iridium, but a lot of people like them. I have owned and used a Helix, AxeFX3, Tonex, quad cortex, and... The UA pedals are the best modeling thing I've tried with the Tonex being a close second at a much cheaper price point.
One thing that is different between the UA Dream 65 and the others is that it just provides the tones of a 1965 Deluxe Reverb and nothing else. The obvious con is that you are locked in to one amp sound for the $399 MSRP, whereas the other things I mentioned have the ability to emulate multiple amps. The pro to that is the pedal basically has all the dedicated controls of the real amp. There are no abstractions, where knob X means "Presence" on one amp emulation and something else on another. I personally like that, and it makes it much easier to dial it in without the menu diving.
Last thing I'll say is that the used story for the UA pedals is good. Meaning, the seller doesn't have to do anything to transfer ownership for you to be able to update firmware, etc... So you can occasionally find them for $250 or so on Reverb if you want to save some cash and be able to move it for basically what you paid for it if you don't mesh with it.