I've been an off road drop bar fan for over 20 years. I first got turned on to drop bars on a MTB, back in the early 90's when a friend of mine and I spoke with a shop owner up in Whistler BC, who used the WTB drop bar. Kevin bought a WTB one and I managed to get a hold of a Nitto RM-3 bar for my Brodie Catalyst bike. I used that set up for off road riding and for daily commuting for over 10 years. In fact, those bars are probably kicking about my parents garage still.
They come in silver or noir, so you can go silver for retro MTB builds or noir for a more modern look. The bars only come in the 31.8 mm clamp size, which would fit either our tall stack stem or the 6 deg stems from VO. Sized 44 or 48 cm, the measurement is from the center of the drops where the brake lever fits.