Laptop PC to a PA system?

[XbambamX]

If this has been discussed already I apologize. I was just curious to know how I can run my laptop to a PA system. I'm using a TD-9kx to trigger Addictive Drums on my PC. I've been told that I can use the headphone out, but I feel that might compromise sound quality. Is there a better way? And does anybody use this type of setup in live situations? If so...how does it sound?

[Michael Render]

The soundcards that come with laptops are notorioulsy noisy and of low quality. You need a decent, low latency audio interface. USB or Firewire.

Do a search to see what audio interfaces people are using to get an idea of what is available.