I've written a quick impression, that was with the 2nd edition Studio V. My opinion is pretty much the same for 3rd Anv.
I will say if you're buying just for full size headphones I actually prefer the 2nd edition the synergy is easier to match. Honestly, the way even my cheap headphones like HD280 Pro, SHR440 sound with Studio V is pretty damn satisfying. If you can get the synergy right your gear will scale up dramatically. It's an excellent unit.