I've been solely using the Maxxis Holy Roller and can only say good things about them..
Love a fat tyre also and at 2.4 they really give a good rounded appearance with loads of grip surface for full contact on corners. They're also made with the MaxxPro 60a compound which apparently wears well and provide heaps of grip when you need it most! They like to be pumped fairly hard though... I keep mine at around 50psi, much less and they are noticeably flat so like to be kept firm.
Have had no punctures with them yet and have used them on varying terrain. They've faired well on most but don't like too much sloppy mud although they will keep you on you toes making for an interesting ride!
Mine get street use mostly and don't think I could find a more suitable tyre. They roll fast, they're nice and quiet and have enough give to soak up the road so work cool with a rigid front end. Work really well on dusty trails too should you go off track. Work great on the beach too.
I would quess both the K-rad and DMR Moto are very similar if not with a firmer durometer rubber so may last a little longer with continual use. Might try the K-rad next when these finally die although it'll be a while yet.
Highly recommend them