Budget preamp recommendation...besides Schiit.

used rogue audio RH 5 , headphone amp linestage.

2 tube followers

adjustable gain.

has balanced in and out

not classic tubey but refined, super clear, dynamic driving sound and huge soundstage.  

This is why I sold my old Krell and went Integrated..

Parasound New Clasic 200 Pre (the NC 200 Intergrated same but with power).

Lots of input/output options, built in DAC, MM/MC phono, Sub out, Hi-pass / low pass, HT by-pass, and tone controll all fully operational by one of the best remotes anywhere. Each input option can also have its own volume level match. 

https://hometheaterhifi.com/reviews/amplifier/preamplifier/parasound-new-classic-200-preamplifier-review/

@tunehead That is quite a preamp for the money, and some very useful features, too. 

Another vote for the LTA MZ2.  I just upgraded to the MZ3 and will be selling my MZ2. I used a Schit Magnius, a diy Nutube amp, and a JDS OL switcher previously.