I'm not exactly sure if this goes here, but it has a little to do with Academics. I am entering Senior year of HS and I am taking an AP Calc class. Since my TI-83 was stolen, I now have to invest once again into a calculator. As a pre-college student planning on taking many math/science classes, would it benefit me any getting a TI-89, or actually, anything better than a TI-83? Being ever money conscious(gas has hit 3.50 in my area!), I have to be thrifty, and do not wish to make a purchase that will not be adequate later on. Please help with advice/tell me to get on another forum or w/e.