ti89 or hp50 or what? Need help!!

Gamo

hi. I'm an econ student and taking courses like international economy, monetary econ, and econometry. in econometry we use statistical formulas and such. and lesson is full with formulas and some of them are long (including derivatives). I need an advice. I m looking for a calculator that I can store loads of formulas even proofs (long long formulas). So it needs to show formula with details. I dont know what to choose. It doesnt need to be graphical but if my needings exists on a graphical one I will choose no problem. As far as I saw that graphical calculators have huge screens that can store long formulas. So waiting for an advice I dont have a money limit just need to choose best one. I just noticed ti89 titanium and hp50g so need serious advice it doesn't need to be one of these. just waiting advice...

Integral

Pick the one suits your buget and needs. The HP gives you the opportunity to use RPN, a superior entry method for calculators. Unfortunatly like Beta max was superior to VHS, the best does not always win.

Gamo

yes but I said my needings so just need an advice. no limit for budget as far as if it supports my needings as I told in the main post

Integral

Either product will meet your needs.