Hi Matt, You may call me Keith, The comparisons of the Dacs with a volume control you have available that you said you would try them direct to amps now gives me special interest more than before with your shoot-out thread , As a few have said, Thankyou for the time and effort you are doing Here, I must say, I am interested in the Aeris for ALL the same reasons you are, I currently have a modest priced tube digital player, sounds great, on the other hand, when I read the things you pointed out about the problems of tubes in general, like ageing to make the sound performance degrade caught my eye, Back in the late 90s, I run all solid state with success, sounded better than any tube componet at the time I ever listened to any where, tube componets have come a long way in this age, that's likly why I have tried tube componets again, But this tube rolling thing of going thru so many tubes has me not wanting to go down that Rabbit hole!, To me, That is like running multiple brands of cables to use them as tuning devices, you could end up chaseing the tail for-ever, which becomes a huge exspense, tube rolling could end the same way, and of course their is always infant tube failures etc..., I do want to point out, I love tube sound, just not the problems, This Aeris has me interested to see how it fairs in the end of the shoot-out, Thanks Matt, cheers.