Bitstamp seems to be good. There's also the Canadian https://www.vaultofsatoshi.com/ https://www.vaultofsatoshi.com/, which seems to be top notch as far as the

Bitstamp seems to be good. There's also the Canadian https://www.vaultofsatoshi.com/ https://www.vaultofsatoshi.com/, which seems to be top notch as far as the tech (multiple 2FA options, OpenPGP cryptography for email, etc.).