I was torn between the Topping D90SE, SMSL VMV D1se and the Gustard X26Pro. Finally opted for the X26Pro since I have a fable for unnecessary over-engineering within reasonable price difference and must say I don't regret my decision.
Transparency-wise they probably are all most likely identical, but I also appreciate build and usability factors and one of the biggest for me is:
a dedicated front power-on/off button, not just pseudo-standby mode like many offer.
Yes, the downside of this is, the Gustard has no auto-standby mode for inactivity or so, its either off or on.
Easy navigation on the device itself (up/down = input switch, left/right volume control) and by included remote.
All settings are correctly saved/stored when powered-off and unplugged.
And yes, the unit runs warm/hot after some hours, but that is expected by its design, so I turn it off when not used for longer time.
Nice-to-have features in the future (maybe with firmware update possible):
- display auto-off after some minutes to prevent screen burn-in in the long run
- additional filters/EQ presets to make more use of the extra DSP chip
All-in-all very well done Gustard!