My problem with the kenda k-rads were they pinched easily, but they have lasted ages, must be four or five years now
I have some maxxis minions 20x2.5 and they are honestly some of the best tyres ever, you can run them at dead low pressures for dh sometimes and the grip is quality, however my friend has som high rollers, which are also great. Its hard to choose, but most of maxxis' tyres are decent, as are kenda, continental etcetc..