I may be out of the norm in this, but I rather like the Hel; the Nidhoggur, however, does not draw the same approval.
Also, I rather like the Archon, as I feel it continues the double-prong design chain that is present in the Executioner > Coercer > Dragoon > Arbitrator > Archon line. Admittedly the top could use to be finished a bit more, but I to very much like how carrier-ey it looks.
As for the Aeon... eurgh. Just, eurgh.