Analogue only preamp ideas? - no need for internal DAC!

Tubes in a preamp take 20-30 minutes or so to warmup.  This is irrelevant for pass through.  You will find that until the tubes are warm, sound will be a little flat.  
AVM tubes should never need replacement and were explicitly designed for AVM.  There are no alternatives.  Expectation is a minimum 10K hours

Rogue or other brands use standard tubes that are rollable.  You should expect between 4K -10K hours out of standard tubes.  
You have to be a little cautious in pairing tube preamps with SS amps.  The AVM is adjustable and is designed to pair with SS or Class D gear.  The Rogues are well suited for pairing with SS.

i have a customer who is considering trading in an ARC SP20 which is a great preamp that will work with SS gear And would work well for you.  The SE 4 input is the home theater bypass.  I could help work out a sale between the two of you or buy and resell the device.  

you don’t need a preamp if your dac has a good sounding volume control. I had a very nice newer McIntosh preamp that I sold because I hook up my dac straight to the amp and I have no need for analog sources like a reel 2 reel or tt setup. Some dacs sound better going thru a preamp so you might want to audition a couple of preamps and compare that sound against your dac connected directly to the amp

Why not buy a phono amp and run it through a volume control direct into the power amp(s)?  Less components and less wire.
If you want to listen to vinyl only a pre-amp is not contributing.  Indeed it is just adding its own signature and a little more noise.
The money you save on pre-amp and wire can go on a better front end, or whatever.

So last couple of posts are basically saying preamps may be pointless.  Maybe a Simple standalone stereo bypass device without so many preampish wires so speakers don’t need to be directly between a dac and an amp (since amp connections are used by ht system)

makes you wonder what the heck a preamp is doing to the analogue signal on its way from a dac to the amp.  Sooo mysterious!

Possibly of interest, Emergingsoul: https://www.youtube.com/watch?v=8dAY7Bc--Ys