Wanted to give a tentative endorsement to Cree. I bought a box of LEDs at the hardware store and about a third of them failed early. I wanted to spend good money on good product; Cree is well-regarded, and so far (a few months) I've been way happier with their bulbs than the cheap stuff.
Cree has been good to me so far. Haven't actually had one fail yet, though I've had a few of the lesser brand ones (Feit, from Costco, mostly) fail. As they go, I replace with Cree.