According to https://cultists.network/140/psu-tier-list/ the RM750e is a
Tier A • High-end PSU
Is it the best PSU ever? I don't know... You can decide that for yourself.
I do like the general layout and design to envelope. They made a great use of available volume with daughter cards everywhere!
The first EMI filter stage is nestled underneath the input IEC connector on a littler carrier card.
Cybenetics has a component breakdown list: https://www.cybenetics.com/d/cybenetics_9Nq.pdf