I've tried the Bernat cashmere and bamboo.
I especially love the bamboo- I have 17 balls in my stash for a sweater. Just a note - the bamboo sheds badly while knitting with it, but after I washed it for the first time the shedding stopped. And yes, I now compare all other yarns to my wonderful bamboo!
Ah, I have warm fuzzies just thinking about my precious bamboo.