there are tons of them, use google
http://www.pcmag.com/article2/0,2817,2403388,00.asp
Probably Linux. VPN gives encryption.What platform are you going to use it on? Windows/Mac/Linux?
Why VPN and Why not a proxy?
Have you looked at our Proxies/VPN section in the marketplace?
https://www.blackhatworld.com/forums/proxies-for-sale.112/
Probably Linux. VPN gives encryption.
CLI is fineDoes it have it to be a GUI or will CLI suffice?