Gfx Card to TV Connection

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

Specs
http://www.amd.com/us/products/deskt...fications.aspx

Samsung ps42b451b

Specs
http://www.samsung.com/uk/consumer/t...=specification

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.

DVI to HDMI will work fine, and the 1 lead will give both Video and Sound, just depends on if you plan on running your sound through a home theatre system or straight out the TV set then you will need another sound cable from your sound card to the home theatre system.