I got the 3.0s this Spring for my next touring ski and am beyond stoked. They are super light for that type of dimension ski without being carbon and way expensive. I've only gotten a few days of touring on them cuz I got them late spring, but they are amazing! I mounted them with kingpins so definitely lighter than your heavier type of touring binding (duke, guardian, those tyrolias mentioned, etc.). That being said I had a buddy that mounted his 4.0s with dukes and I couldn't believe how light they still were (I got to ride them for a few runs). My last touring setup was dukes on JJs and the dukes on the 4.0s was a massive difference. Honestly it wouldn't even be that bad for a main touring ski and you'd have a super solid binding underneath your feet for sending on.