I guess it is theoretically possible another amp might sound better, but it will be a long time before I part with my X600.5 amps. If I did it would be for the X600.8 amps.
--------------------------------------------
Lumin S1
Sony XA5400ES SACD
Pass XP-20 pre, X600.5 amps
Magico S5 MK2 Mcast Rose speakers, SPOD spikes
Shunyata Triton v3/Typhon for source, Denali 2000 (2) for amps
Shunyata Z Anaconda XLR analog ICs, Z Anaconda speaker cables
Revelation Audio Passage Cryo-Silver Reference DB-25 umbilical power cable
Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables
Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
Three 20 amp circuits.