Best integrated/power amplifier under $6000

Im going to be using the RAAL SR1a headphones that need a minimum of 100w into 8 ohms to shine. they were tuned on the Benchmark AHB2 so that would seem like an obvious choice but considering other options as well (and a bit more power/headroom so I mentioned 150WPC - but I could also run Benchmark AHB2 monoblocks)

Having heard the Parasound A21, I don't really like the sound by Parasound  much. Other amps that Im considering are:

-Chord CPM2650
-Anthem STR

Bryston 3B3 & 4B3

Luxman beats Parasound and Pass by a wide margin IMHO.

There is a used Levinson 585 out there now at usam for 6k.

Killer DAC built in, I’m currently using the 585 myself (not mine for sale), would be fun to compare yours to it.

It’s awesome, 12k MSRP. Doesn’t have a phono section (that’s the 585.5).

It’s universally praised in reviews, and my 2 weeks with one I’ve been very, very pleased.

Pretty flexible also, all sorts of ways to configure it.

Edit - just saw you are using headphones (I'm not a headphones listener).  It does not have a headphone jack.

Hegel H360.  I own it and love it.  250W per channel into 8 ohms.  I can't attest to the DAC as I don't use it.  Maybe wait for the H390??  Phenomenal integrated amp.  Drives my Raidho's so well.  Can't imagine another integrated that will do better.