K-Horns are so efficient, that you really don't need hardly any power at all. Heck, your iPod you could prob sufficiently drive them.
Obviously, being horns, you definitely want a tube amp - and there are many very good choices amongst low-powered tube amps currently available.
I love the A-S S30 - I own one - but, that amp really shines best with 16 ohm speakers or higher and I believe the K-Horns are only 8 ohms. (Using Hedlund Horns with AER mk 1 16 ohm drivers, I was nearly chased out of a large room by an A-S S30 during a suddenly loud passage).
Since you want a lot of head-banging capability and heavy driver control, I would look at any of the moderately powered amps from VTL, BAT, Audio Research, and Quicksilver.
Obviously, being horns, you definitely want a tube amp - and there are many very good choices amongst low-powered tube amps currently available.
I love the A-S S30 - I own one - but, that amp really shines best with 16 ohm speakers or higher and I believe the K-Horns are only 8 ohms. (Using Hedlund Horns with AER mk 1 16 ohm drivers, I was nearly chased out of a large room by an A-S S30 during a suddenly loud passage).
Since you want a lot of head-banging capability and heavy driver control, I would look at any of the moderately powered amps from VTL, BAT, Audio Research, and Quicksilver.