Chris King hubs really aren’t all that. People I’ve known with them have had more problems with them than many other brands too, they need quite regular maintaining and adjustment, and they’re also not that light. They also make a bloody annoying noise!
Cheaper, better quality, and quite a bit lighter, are DT240S hubs (which I’m surprised nobody has mentioned yet!). I’ve been using DT’s for years now, wouldn’t go back to anything else out of choice. They just work! Strong, reliable, lightweight, don’t have an annoying freehub noise (unlike Hope, CK and most others out there these days), the only downer is they really are quite expensive for what they are, though cheaper than CK.
Hope’s are great on a relative budget if you can put up with the freehub noise.
Have heard lots of good things about those A2Z hubs njee says about, but lack of axle compatibility would warn me off cos I’ll never run a QR up front on any Mountain Bike ever again (unless it’s a rigid fork anyway).
Shimano XT/XTR can go on and on and on, if looked after well from day 1. From the factory, Shimano hubs come with very little grease in. Pull them apart when brand new, pack full of grease, but BE CAREFUL not to overtighten the cones (as a lot of people do) cos this leads to premature wear. Well looked after Shimano XT’s or XTR’s will easily last a very long time, certainly I know of sets of old M900 and M950 XTR hubs still going strong to this day.