I switched from 505 to Nook a couple months back. All my drm'ed epubs and pdfs from Sony and elsewhere work fine through ADE. Nook is great. Love the page turning using touchscreen. Screen contrast is about the same as the 505. Be aware, it is a bit heavier and needs to be charged more often. I got 5-7 days between charges with airplane mode. Still love it though since both issues don't bother me. Anyway, good luck with your decision.
