looking for a Integrated amp $6,000 range

What sound characteristics are most important to you, are you open to tubes, and as others have asked, what speakers are you using?  You’ll get much better and more useful recommendations here just providing this basic info. 

You can get an imported Japanese Accuphase E-480 with a transformer from Audio Cubes for $8K.
https://audiocubes.com/collections/amplifiers/products/accuphase-e-480-180w-ch-integrated-stereo-amp...

I’m using the Legacy Focus and a pair of Magnapan smg-a on occasion.

Raven or Luxman depending on your power needs. Luxman makes a variety of integrated amps at various wattage output.

Possibly of interest: https://www.youtube.com/watch?v=NlBDj3Bw2sU&ab_channel=ZeroFidelity

Comparison of:

Yamaha AS1200: 90w (8 ohms) Single Ended Circuit. $2,800 150w (4 ohms)

 Luxman L550 AXII: 20w (8 ohms)*** Balanced Circuit. $5,500 40w (4 ohms)***

 Accuphase E480: 180w (8 ohms) Balanced Circuit. $13,000 260w (4 ohms)