I didn't hear it with the super-v, but on very efficient Volti horns a few times - there is a Vinnie Rossi LIO in the trading post right now that is a lot of bang for the buck and sounded very good on the high efficiency setups I heard.
Seeing as you have battery power working for you right now (and the Dodd pre to go with it), if it were me I would at least ping Danny for a price on that 15wpc Dodd amp he threw out there; putting those two pieces together just can't go wrong.