The 5xx is nice although slightly more specific on who it’s for, it’s more similar to the deva (but it’s not a deva) than the 4xx/400i (haven’t heard the se yet)
Have some overall thoughts and comparisons to the other hifiman in this post and others below that follow it
I would disagree there, on most budget to midrange tube amps they did not play well imo, hybrids were nice though