Tube Preamps.....

 For the adcom amp recommend Rogue Audio Perseus magnum built in phono as well, used for around 1400.00 usd  you could roll the tubes all 4 are 12au7 , so no mix and matching headaches, but the jj tubes that it come with sound amazing as well.I dont do dacs , just a palystation 1 for cd duties that to my ears trounce my  marantz cd 6005 cd player, and you can get one of the p.s. for 40-50 bucks! Must be the scph-1001 version as it has the rca output jacks! Save your money for more music...

@judgementday,

I sold my AI MB3 when I found that my MZ2 was a superior sounding preamp even though it doesn’t have as much functionality. The one outstanding thing about the AI MB3 was the incredible John Curl phono stage. My solution was the buy a Parasound JC3+ for phono and use the MZ2 as a line stage.

surprised  no one has mentioned the DeHavilland Ultraverve 3.
uses one 6sn7 so tube rolling is a dream.