I've heard nothing but good things about
https://www.privateinternetaccess.com. Costs $35 per year and they accept bitcoin.
I don't use them personally, but I plan on switching to them when my current VPN expires
I'm pissed off at them. I sent them money for a subscription and they never sent me a confirmation or details. I contact their support and they wont send anything without confirmation info - but I never got any! Basically, they took my bitcoins haven't given me service and refuse to do anything about it. They ripped me off.