Hello, this is my first post here. I'm from Argentina and I'm studying engineering. Currently, I'm using a Casio Fx 570ES. So far this calculator has been enough and I don't know of anyone in my school  who had needed a powerful calculator to get the degree.
As far as I've seen about this calculators, I would find pretty handy the extra memory to store more conversion factors or constants. Even though I don't know how the programming tools work, I think I could find a way to store for example  long formulas, right? I will not need graphics tools at all (just regression to calculate interpolation in tables), Stats, equation solver (especially for 3 unknown), integrals, derivatives functions are important.

So guys, what do you think? should I buy one of those calculators or my Fx570ES should be enough?

thank you!