I have heard nothing but bad things about the Boyd Needlemaster. I would go for the Denise...I just ordered a kit myself! Even though it's the cheapest, I hear it doesn't snag at the joins like the Boyd set does. As far as bamboo, I don't know. Pretty pricey to start off with, but bamboo is really nice...maybe in the future? But the Denise kit saves hundreds of dollars over buying each individually. Did you read the review from Knitty in the Denise website?
That's what solidified it for me.