I have a computer with this graphics card "ATI Radeon HD 5450" and would like to connect it to a Samsung ps42b451b TV

ATI Radeon HD 5450 1GB DDR3 graphics


Samsung ps42b451b


I have no idea of the best lead to purchase, i'm thinking possibly DVI to HDMI cable?? If that's going to give the best picture does it matter what type of DVI to HDMI cable? Also from reading around will i just need the one lead for picture and sound or will i need a seperate lead for the sound?

Any advice would be great, i have tried the usual routes.