I really like Vinnie and think he is a stand up guy but his power amps have their limits and are great as a compromise between , heat, size, power and SQ. I thought the F1 was the better amp for the k1000 in a head to head with the sig 30 amp but YMMV.
I like the battery solution for items that may not need huge amounts of power like a cdp or pre amp but question their usage on high draw power amps