I was going to convert to e-pub the dozen or so books I bought from Amazon w/the plan that I would have all books on one reader (the iBooks, naturally). While using Calibre I got the DRM message disallowing the conversion. For some reason I thought getting Calibre would let me do this. I'm fine w/both readers, but just want things simple. i.e. all my books in one place. Is it worth going to the trouble finding a way around DRM? Opinions?