Is there anything these calculators do that one can't do with the Windows calculator in Scientific mode?
Complex math - which is something I do use.
I bought a Hp50g (cause mivey recommended it) For some reason it is not easy for me to use. I went back to my 20 year old 42S.
Now that HP is getting back in the RPN calculator business, I'll likely buy one of their Hp35S, $60. It says it can do complex math.
Or maybe get an Hp48xx, $110. That one looks like it can graph and do complex matricies. Which would be okay - but not if it is non-intutive to me.
In order for me
RPN
All the regular eng/sci stuff (log, ln, trig, sqrt, sqr, x^y, e^x, 10^x, deg or rad,)
Definitely want a pi key
Complex math, rect > polar (and back)
Complex matricies (used occasionally)
graphing (never have used on with it - might be fun)
cf