A little update to my order. Sean of Zu informs me he has an improved finish called Soft Touch, which purports to be, well, softer to the touch! That is, over their more standard Nextel. I'm likely to go for this in Cosmic Carbon.
Any further thoughts re ongoing experiences with the Def4s by owners who've had them for a while? Early adopters must find they're close to fully burnt in now.
Are they improving further as they open up?