I wouldn't call the H-IIIs bright, nor would I call them warm. Pair them with a bright amp, something like an Integra AVR, and you'll want ear plugs. Pair them with tubes or a MOSFET amp and you can listen for hours without fatigue.
Having owned them for about 15 months, the only notable weakness I detect, other than bass extension, is a very slight horn coloration in the midrange. It doesn't "shout" or "honk" the way some describe horns, but does add a very slight "chestiness" or thickness to vocals - at least compared to my Spendor 2/3s. I plan to damp the midhorns with some bitumen (Dynamat) sheets in the near future.
Having owned them for about 15 months, the only notable weakness I detect, other than bass extension, is a very slight horn coloration in the midrange. It doesn't "shout" or "honk" the way some describe horns, but does add a very slight "chestiness" or thickness to vocals - at least compared to my Spendor 2/3s. I plan to damp the midhorns with some bitumen (Dynamat) sheets in the near future.