I think xfx is the only one with lifetime warranty now. However, they only do amd cards now iirc.
If my GPU dies 2-3 years after I bought it, that means it's telling me it's time to upgrade. I haven't had a GPU fail since my old 8800 gt which was artifacting like crazy, but it still worked well enough for me to upgrade it on my own time.
So any company that offers 2-3 years is good enough for me.