Which Texas Instruments calculator is the right one to buy?

Question

I have a ti-83, but I am looking for a new calculator. The ti-84 plus is riced a t $70, the ti-84 plus silver is priced at $100. The ti Nspire is about 150 (Texas Instruments recommends this for college math), and supposedly for calculus the ti-89 is the best. Can someone please help me with which calculator is the best. My fall semester includes college calculus.

Answer 1

I have an 89, I like it but I liked my 86 better.