Bat VK 42se or Audio Research LS 26

Need help which one is more musical and better sounding for my Krell KSA 300s

Please I need any suggestions and why....

Huh? One is solid state and one is tubes. Apples and oranges and only the person that will own them can know
which they prefer.
Also, why wouldn't you simply use a Krell preamp with that amp?