Which would you buy?

I'm leaning towards nook because of book lending, 500,000 free books from Google Book project, and it's just cooler. But I think Kindle will have better selection and does have longer battery life. I haven't actually touched either of them. I'm a little worried that Nook may be sluggish, mainly because they haven't let anyone touch it yet, they always have a product presenter showing how it works.

So, what would you buy?