Okay, what hardware do I need to start using VoIP? (Score 1)

Hey I've just moved cites and I decided that instead of getting a regular line, I would try Vonage. Is this the wrong place to go for VoIP? SIP? Asterisk? If so what hardware is suggested. I'm planning to make this my primary phone so I want something that is rock solid (as long as my internet connection is up). Also, I don't want a computer to be requried. I simply want to plug a regular phone into a router (which I want to purchase, not build) and go! I basically want this to work as a regular phone line. Any suggestions? Thanks!