Besides the traditional B&W films, try Ilford's XP2 Super (make sure it's "Super"; I bought 30 rolls at a great price and found out it wasn't "Super". Plain XP2 just isn't the same). It has great latitude, so can be used indoors (up to 800 asa) and out (I usually shoot it at 250 asa). Many labs can process's chromogenic, so is processed just like color film. Ritz Camera charges around $3 (without prints, which come out lousy anyway). Just be sure to request they not touch the negatives with bare hands; fingerprints are difficult to remove. Unique Photo sometimes has specials on 3-packs, otherwise I usually get it through B&H. Good Luck!