Best Calculator for a Nerdy Child

My child might soon be taking AP Calc and / or the SAT. It seems like the best calculators are:

HP Prime: Fast, friendly, and well-built.

TI Nspire CX II CAS: Python-programmable, and a lot of functionality.

Any thoughts on the best choice? Kid is super-nerdy and glad to learn things. They'll likely use it for a long time.