Best amp under $6k, in your opinion?

Tvad,

the Moscode looks real interesting, kind of like APL UA-S1?
What source and speakers do you use with the XA-60.5?

Sources are APL Denon 3910 and KAB Technics SL1200 MK II with Heed Quasar
phono. Speakers are Silverline Sonata III (93dB).

Hello Perrew, Mk2 is the same Spectron in the sense of the speaker control. There are small improvments, of course - bass is tighter, faster - imaging is sharper.
Where Mk2 shines its the midrange (and highs) - literally SET midrange - many people who own both can tell you the same.
Good Luck
Rafael
P.S. Atm-Sphere is also great amp but only, only if your impedance is never lower then 4 Ohms

Pass Labs X250.5 or X350.5

I think SP uses Belles amps to voice their speakers.

After owning several Belles amps and others mentioned here, I must tell you one amp stands head and shoulders above the rest.

Get a trl D225 stereo amp as it is the best amp for your speakers. I can say with 100% confidence you will not find any amp under $6000 that sounds as good.

Amazing amp that breaks through the sound ceiling I thought all home stereo was under. After owning and hearing amps in my reference costing up to $14,000 the trl was a complete revelation.

I know I sound over the top, but after just a few minutes with this amp you will experience what I know.

Bill