Tube amps under $7500

@yoder New one to me, like so many tube amps here. Thanks. I am indeed also considering Coda and will check out this one as well before pulling the trigger.

I'm going to put in a vote for the VSi75 by ARC.  One can probably find it used for under your budget.

@hotei  Integrateds have not ben on my radar, partly because failure on one end renders the other useless until repairs are made. But I must say, ARC for both pre and power at a reasonable price is a serious temptation. But then I wonder whether anyone would seriously recommend this unit with Legacys? 

Points well made and I'm not familiar with Legacy speakers.  However,  I pair a VSi75 with my Dynaudio Heritage Specials and it seems to drive them just fine.  And when playing vinyl have a Ref2 SE phono pre use a LOMC Lyra Delos and again seems to sound fine.  Of course I have a smaller room and moderate volume levels.

Audio Research i/50 meets your requirement for tube with balanced inputs and at the price point you mention.