Best calculator for the working engineer

[Voldemar]

(02-25-2016 07:31 AM)Anodos Wrote:  But what non-vintage RPN calculators do have a nice keyboard?

Members recommend to buy a variety of old calculators, but these are hard to find and not cheap. Is no longer a lot of current RPN models. How about HP 12c? HP 12c will not disappear from store shelves for years. The lack of trigonometric functions on HP 12c is disappointment. But for simple calculations, it would be a good. What do You think?