Patrick McManus wrote some delightful humor columns for an outdoors sporting magazine (Field & Stream?), which are collected into various books. One of the columns, in one of the books (sorry--they're packed in some box somewhere) is about justifying and sneakily adding to his collection of guns (hunting rifles). It's a riot, and while reading it I saw major parallels to my guitar collection (only 3). You can probably find his books at most bookstores, and they're worth buying. The column I have in mind will also give you some great, off-the-wall tips on overcoming resistance to the growing collection.