IMO should just bought that MeanWell. Unless in harsh conditions with 24/7 operation, nothing would happen to cheapest model. Different models have different parts too. Cheapest series have capxons in them, more expensive ones Japanese only capacitors. Manufacturer warranty period in the datasheet is quiet different too 1, 2, 3, 5 years. About failures written, you get what you pay for, if you choose cheap PSU for harsh and very demanding conditions, then what you should expect? At least I don't see how MW power supplies can be less reliable than consumer grade ATX power supplies.
P.S.
All those who wrote about new ATX uber technology where rails are separately regulated, DC/DC converters inside

, where did you get that stupid idea from? Maybe in some 1000W+ mega expensive ones, but not in mainstream for sure.