Welp, I got a pair of Alpha Dogs secondhand recently and for the most part, I could see these being my daily driver. If I didn't have a pair of hd800s that is. It's super difficult to choose now.
I like the detail, staging and spacing from the hd800s while being ok with the sound signature out of my Lyr/Bifrost combo.
I like the silky, rich sound of the alphas that are *almost* detailed enough to be reference level to me. They are slightly less good than the hd800s at the technical stuff, though.
Both are very comfortable and I don't feel like I'm missing out with my current source set up.