Sad that the display and transport mech both break in just about all of them.
I have owned just about every single high end SQ HU out there, my top picks:
Pioneer DEX-P99RS, never selling mine, I love it to much. Spotify 320kbps>iPad>iOS input on P99RS=heaven
Clarion DRZ-9255 (HX-D3 if you can find it). Even the analog aux input sounds good. Classiest looking too. I also have one of these for an upcoming SQ build, I would only sell it to upgrade to the HX-D3. Horrible transport mech but I haven't used a CD in years.
Pioneer ODR, big $$$. My dream setup but too much $$$ and too many pieces to install.
Sony C90/XDP-4000X - the real winner here is the XDP, incredible sounding dsp, sadly very limited xover points.
iPad Mini--->Helix DSP