You should start at the Technical Universities. The one I went to (Netherlands) the HP32S was the standard calculator.You had to buy one. So I switched from my TI-64-programmable to the RPN and never used anything else again, hooked perhaps? I will allways prefer RPN. BUT if I never got in contact with that HP32S I would never have learned RPN. And if you don't know what you miss you won't miss it.
Menno