What's the best calculator for the CA Engineering Surveying Exam?

This video compares three popular calculators approved for the surveying exam by the California BPELSG: TI-36X Pro, TI-89 Titanium, and FX-115 ES. The FX-115 is by far the fastest for entering DMS angles.
Also, although not noted in the video, FX-115 (and TI-36x Pro) are only about $20, while TI-89 is upwards of $100.
TI-36x Pro: www.amazon.com...
TI-89 Titanium: www.amazon.com...
FX-115 ES Plus: www.amazon.com...