SeeSax
Headphoneus Supremus
Have you heard the Mason V3+? Having both Mason (one for your son), that's awesome! I think the Mason V3+ is good too, quite improved from the V2 while retaining most of its character. But compared to the Mentor V3+ it has more bass. You might like it more, but for me I like the Mentor V3+ more because of its leaner, more clarity-focused sound.
Only heard Mason V3, not +, and enjoyed it greatly. A nice refinement of V2. Mason holds a special place for me of course for reasons you mentioned
@twister6 I remember the sale, which makes it more painful that I decided I wanted it afterward!
-Collin-