Improving my Preamp

I’m looking to improve my dedicated two channel preamp 

Right now I’m using Parasound Hint6 as preamp I know is (integrated) but looks much better than P6 😂😂😂

My budget is $4K-$6K

i really want to try TUBE PREAMP with my Solid State Amps 

Right I’m thinking about this 3 preamps 

1.Audio Research REF6

2. Audio Research  LS28 and

3. SimAudio Moon 8P 

My current set up: Klipsch Cornwall IV Klipsch EPIC CF4 and focal chorus 807V W

SimAudio moon evolution W7 amp SimAudio Supernova CD/DAC

Classe Audio  CA-2300 amp Parasound Hint6 Cambridge Azur 851N DAC/Streamer

and Pair of SVS SB16 ultra  

I need at least 2 set’s  of balance XLR inputs

PLEASE I’m not interested in any TUBES AMPS thanks 🙏