Audible rewind markers for podcasts and audiobooks

Hi Tenzip - I’m still using an m230 to listen to audiobooks, which I download from NetLibrary.  The only problem I face is that if I have to renew my license (after 3 weeks) it automatically resets me to the start of the book and the fast forward on the m230 is not progressive, so to get to the middle of a 12 hour book takes holding the button down 1 hour and 20 minutes (a real pain in the finger).  Sound like you’re the Sansa Fanatic, so what model would you recommend for my use?