I've been listening to Opus#1 since last night and it's a nice upgrade from the X5II + E12A stack. The screen does feel like it's straight from 2007 but that doesn't bother me, it's a nice throwback to the days when nobody next to you could see what's playing on your laptop screen
cool thing is when you turn the screen off it goes black and white while it's dimming out, I actually like that a lot, you can see all your album art in B&W
The interesting part is that I'm using 105/150 on High Gain on the #1, 82/120 on X5II on Low Gain, and maybe 35% of the volume put on Low Gain on the E12A. For a DAP that's significantly larger that's a surprise, but I guess if I ever need more volume I'll just get a balanced cable
To be honest with you I'm not quite sure if the metal version is worth the extra cost, one of the metal SD slots is off by a fraction which makes getting the card out MacGyver worthy. When you slide the case on it doesn't even matter what it's made of since 95% of the player is covered. Whether the upgraded amp is actually of noticeable difference I can't tell you either. If I did it again I'd just purchase the plastic version for sure, and if it weighs less in plastic that would be a bonus as well.
I do have to say that I love the buttons on it, you don't hit anything accidentally as you slide it in and out of your pockets. The domed back of the player makes it more natural looking in your coat and pant pocket and it looks like the corners won't wear into your clothes since it's padded, you know, the 4 light colored corners on your jeans from daily use. The case is sturdy slick "leather" so it slides outta your jeans super easy by just pushing up on the bottom of the player.
The UI seems pretty decent, I'm pretty basic so I'm just happy that I can navigate the menus quickly and without lag. But it does have a feature I think is pretty cool, when you change the volume it comes up with a screen that has a bar on it which you can drag up and down with your fingers to quickly get a big volume delta, you know when you get a vinyl rip sometimes that's significantly quieter than the rest of your files. Not quite a volume knob to twirl around but not bad at all
Sound wise I couldn't be happier for a daily rig. Everything is smooth across the board, the X5II has sometimes boomy lows and synthetic sounding highs on the Lyra II with odd but minute (yet systematic) sibilance with silicone tips, they really amplify the DACs short comings hence why I only used the provided foamies per CAs recommendation. I switched to my M/L spiral dots today mid-day while listening to the #1 and the sound opened up quite nicely, it sounds a little less like a recording studio and a little more like a live venue. What makes this a great daily combo is that the highs are recessed enough that you don't get fatigued but the treble extension is still very audible and provides a good amount of detail, and the lower end drowns out ANY outside interference.
Just FYI, I get a really good seal with the spiral dots, they're hard to pull back out of my ear and "pop" on their way out. I hear more distinct timbre with the foamies, but the dots have a larger soundstage with more separation/layering at the expense of some mids but with really clean cut highs. It really feels like going from listening to a band in the recording studio, to listening to them practice while you sit in the middle of the staircase in their first floor brick-walled apartment.
Overall this combo may not instantly wow you, but the longer you listen to it the more it grows on you and you learn to appreciate its laid back but atmospheric sound signature. Very forgiving, lots of foot tapping and head nodding, will take a back seat while you're trying to focus but will also pump you up enough to give you the drive to focus.
That's all I got for now