Personally I think the 1Z is perfect for me, I don't travel a lot with it, it gets mostly used at home. It also doesn't have streaming services (which is fine) I pure audio player, and in my opinion blows away every other DAP I've ever tested, sound quality and UI experience. The Hiby R3 is a great little DAP that does great on the go, with a good set of IEM's, also some over the ear phones, I'd say anything over 50ohm it starts to show it weakness. I Also think the AK Se1000 is great, it's a bit larger and has some crazy sharp corners (needs a case) but sounds great with IEMS and just about every pair of headphone I've thrown at it. I've also tried the DX150 for a month or so, also great interface and sound, a bit "meatier" than the R6, but personally I've had a kinda of wird issues with streaming, SD cards, sluggish UI, and crashes, but it sounded really close to the WM1Z with amp 8 (balanced 4.4)
I'm waiting for the R6 Pro to be released (hopefully soon) That will most likely be my "on the go device" I do like the Hiby sound and UI.
For now, the Wm1Z is my main listening device, mainly at home, and I use a iPhone with a DragonFly Red on the go. Good Luck. Cheers!