Ipredator is a good vpn, i like in the US so naturally my ping sucked pretty bad, so its only for browsing the web and doing high volume traffic (torrents). using bit torrent my speed basically maxed out. and you can also use it to circumvent firewalls, in place by your school or government or what ever.
currently it is 149,00 SEK for 3 months that's 20 USD. so about 6-7 usd per month, that's pretty cheap.
1 thing, if you want true anonymity, you HAVE to do this one thing with disabling ipv6 support or something, because your true IP can be "leaked" out.