Looking for a amplifier. Need help. ML Classe

Hello,

I am looking for a power amplifier but I don't know which one I should get. I use to own a Denon POA-S10 power amp, before I sold it so that I can upgrade my amplifier. In the meantime, i am using a Denon POA-T3 as a temp until I get a power amplifier. I never owned this amplifier so I don’t know how they sound. I need some help because most of these amplifier I have to order it online or through a phone. I am looking for a good power amplifier that is going to last me for a long time. My price range is up to $3,500.00. All of these power amplifiers that I pick out are used. I need some help, suggestion, and recommend which amplifier I should get or look into.

Mark Levinson 332 ($3200)
Classe CA-400 ($2800)
Classe CA-301 ($3100)
Pass Labs X250 ($3600)

Thanks,
Brian

My System:
Mark Levinson No. 380 Preamp
ProAc Reponse 2.5 Speaker
Denon DP-S1 CD Transport
Classe DAC-1 D/A Converter
Denon POA-T3 Power Amp (Temp)
Denon POA-S10 Monoblocks (had before)
Stealth Vandrig XLR & AES/EBU
MIT Shotgun RCA Interconnect
Kimber Monocle XL Speaker Cable