I was actually at SteveK's last night. We were listening with the autoformers connected at teh 4x tap (a 16 ohm load) for the VTL's. Very nice and very easy on the amps.
Steve says every time he ups the tap used (8, 12, or 16 ohms), the bass gets better, deeper, and tighter. That's almost certainly the best bottom end I've ever heard from a pair of III A's.
Bryan