There’s no best. But do get 7200RPM/FW800. I use and like the G-drive 750G mini-drive https://www.ecost.com/p/G-Technology-Hard-Drives/product~dpno~8814891~pdp.giebeec
Another is LaCie rugged triple portable but the portable only goes to 500Gb/7200RPM. Careful: always verify its 7200RPM