I got the HP15C Collector's Edition, because I always lusted after those HP calcs, and never could afford one. People in this thread asking: why? Well, many of the calculators on screen are simply worse, or copies of decent calculators but you have to press every button with the freaking mouse. A dedicated calculator feels nicer. Copy&paste is nice with an on-screen calc, I admit.

I do have a few other calculators as well, so I'm definitely biased.