LCD HDTV Buy Now

I have an old school Dell computer. Dell Dimension 4100 to be exact… It has a 120 GB extra hard drive on it, plus a high speed internet connection… So basically, what I’m saying, is that it gets the job done. I have a less then one year old Samsung HDTV, and it has HDMI outputs, S-Video output, Y-P- whatver the smurf it is outputs, basically everything you need…. I want my PC monitor to display on the TV. I know I need to get a video card, plus a cord, I got a buddy that is going to hook it all up, I just want to know what people recommend. My computer is definitely not HD, my TV definitely is, and I want something that will optimize the potential between the two… I want to be able to watch my computer movies on my TV… I will either be shopping at Best Buy, or Fry’s Electronics (I live in AZ), or on the internet, depending on the responses I get. This is my first time posting on here, any help would be much appreciated. Thanks a lot!
Thomas