that is a sexy Pre Amp,
you said your removing your PC from the set up, so what are you going to be using to hold all of your music? You mention Media Accesses, I wonder if you can stream 16bit flacs wirelessly through a local network... or would you be transfering all your music from your PC onto another device.. it may be wise to move all of your music to a external hard drive, and find a Pre Amp that is usb combatible. Oh hey the iBasso DX50 is usb compatible! Ppl have had success using the dx50 to play m usic off self powered 1TB external drives, so you could with that direction. Get something like a Dx50 and run all your music from a self powered external hard drive. Not sure how long the Read Times are on the DX50 with a TB of music [could be upwards of 10mins] but that's not longer than your already waiting for your tube to warm up... but the DX 50 lacks a digital line out
May I ask what your budget is btw?
You could encode everything to CD and get your self a nice CD player for around $400 or so... but then there is the time and cost of burning CD's