Amp suggestions

Hiya,

I'm thinking about upgrading my Parasound A21 amp. I'm driving PSB 4 ohm speakers and my rig is set up for 90% vinyl, 10% digital. Units I've considered in the $5-6000 dollar price range include:

McIntosh MC302

Bryston 4B-SST2

Pass Labs XA30.5

I don't play at very loud levels, but the 30WPC of the Pass concerns me a little especially given the 90 percent vinyl.

Any other brands and input greatly appreciated!