I heard this unit the Synthesis A40 Virtus 40W tubed integrated some months back at Deja Vu Audio it sounded fantastic and has a built in Dac. Not sure the exact price but somewhere in the neighborhood of $5K and a really well built great sounding piece. And it's 17" deep so you're good there!
http://www.synthesis.co.it/action-a40v.php
http://www.synthesis.co.it/action-a40v.php