Kerouac
Headphoneus Supremus
You obviously know your **** and I'll refer to this post when I get my 5TX. But you're basically still just using a player (a Digital Audio Player) and the 5P amp, eh? And, of course, high end headphones. My player is JRiver Media Center which I bought for $50 and downloaded to my Lenovo Win 7. I listen to it through Marshall Monitors. It blows my mind but I wouldn't mind 2 blows.
Yes, the X5 is a Digital Audio Player. But different players have different DACs inside and that also contributes to the sound quality that you'll get in the end
When you receive your 5TX, it'll probably blow you away