If you're worried about it, get a VPN, not a proxy.
You can just get a seedbox and the majority come with ssh, so you can use them as a VPN.
Get Console2 + Cygwin, then to use the VPN you would do something like so:
[code]ssh -D 8080
[email protected][/code]
Then you enter your password, and you're in. Then you just set up your browser to localhost, port 8080, socks 5. Then there you go.
The benefit of using a seedbox instead is that you can download through the box, and then SFTP it to yourself. If you browse via ssh and then SFTP stuff to yourself, not even your ISP can tell what you're doing. All they can tell is how much bandwidth you're using.
Get one somewhere like The Netherlands.
www.whatbox.ca
Not the best deals in the world, but pretty big on anonymity.
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I wouldn't bother with the free crap that is slow as snails like Tor, bunch of bullshit if you ask me and insecure for confidential information. Gotta pay for security and reliability.