Thanks for the responses so far! Much appreciated!
And good answers.
I think I'll use the pages standard, keep the number of books as a side note, and just use the Calibre calculations to help with the fanfic ones (after all I've developed a habit of ePub-ing my favs for myself anyways...)
*moseys on over to the MobileReads group*
I was hoping there was a bit more of a lazy person friendly way to track a to read list than a spreadsheet (What? Can't developers read my mind and make it for me before I even express an interest in it?) ...I find I just get tired of maintaining a spreadsheet - like I said; lazy - and it eventually falls by the wayside.
Also I must say I've enjoyed browsing others reading lists. Found some interesting new books to add to my "To Read list".