Should I get a TI 84 Plus graphing calculator or an HP 50 G? Or something else?

I'm thinking of buying a graphing calculator that's very user-friendly, affordable, and perfect for trigonometry and precalculus. I am very familiar with the TI 84 Plus, which is pretty good and was provided by the school, but I have a feeling it's overpriced. Maybe another calculator can deliver the same or maybe an even better performance for a lower price?