[spex x]

I don't know anything about the TI-83, but I've got several fiancial calculators. IMO, they're a good thing to keep in your office, car, briefcase, backpack, pocket. I just about always have one. So obv, I'd recommend that you get one. You can get a cheaper one for like $40 at Office Max, it'll work fine, and prob be less hastle than trying to make your non-financial calc into a financial calc.