I'm basically a full-fledged metalhead, and the Mad Dogs are great. Many of my harsher recordings were made very enjoyable by them, and I'd actually describe the treble as neither prominent nor shelved; and even then, I've EQ'd the treble to great success when I wanted more sparkle. Usually I shy away from some albums entirely because I was afraid of harsh cymbals or crashes or ****ty production heard on other systems, but the Mad Dogs excelled in letting me get back into them.
Other than that, their darker presentation worked very well for metal, but particularly for black, doom and sludge recordings: helped emanate the "timbre" of the genres very well. Layers of distorted guitar were rendered very cleanly and transparently with that full, beautiful midrange, while the tight bass keeps up with the fastest double bass with no problem at all, with plenty authority.
Thanks for the input! This is reassuring...I do tend to prefer a darker, warmer tone overall so I figured they will be a good fit, and it's good to hear they are not overly harsh. I listen to quite a bit of black metal and doom myself, so I can't wait to hear them on the MD. I'm not sensitive to treble, but I'd like to try out something that is considered 'bright' or 'bright neutral' as a point of reference one day before I look into something like the HE-4/HE5-LE. It looks like the MD will remain my next purchase.