I would avoid the PanAm for the Audezes because the PanAm has highish output impedance (I wish ALO would provide the exact specs) and will not be optimal in terms of delivering current / power to the low impedance Audezes.This mismatch usually results in a sluggish and soft sound, which IMO are not a good match for the Audezes since they are laid back sounding. I've never liked the Audezes from any amp with highish output impedance, since that goes against my personal preferences for sonics: having tight bass, articulation, precision. I know Headfonia loves the PanAm with the Audezes, but he seems to have a tendency of writing and promoting reviews of things that he sells in his store. In other words, I believe he's shilling the stuff he sells. YMMV though, and it may turn out that you may like that sort of gentler mushy muffled sound.
The Burson Soloist is pretty decent. A huge step up from the HA160 which sounded excessively un-dynamic, polite and forgiving when it wasn't distorting (clipping) the Audezes at higher volume. The Soloist's sonics are similar to the Mjolnir, maybe a hair more etched with less rendering of microdynamics. The Mojo is way more powerful though (I use the Mojo to power 8 ohm speakers and it hasn't blown up yet.)
At the end of the day the Mojo is a much better deal. The drawback of the Mojo is that you can only use headphones with balanced connectors and you will need a DAC with high quality differential outputs to maximize its potential.