For the most part, doomgiver and aroraanant are correct in that there are no real differences in using a TV or a monitor with your computer. However, TVs tend to be more expensive because it has a lot of extra features that monitors don't have. For example, TVs come with digital tuners, more powerful image processors, more ports, etc. If you are planning on buying a new TV/monitor, I would suggest getting something specifically made to be a monitor because they were will 1) cheaper and 2) more cost efficient. What I mean by cost efficient is that for the same amount of money, you will be able to get a monitor with better picture quality than you will from a TV. The only reason I would see for you to purchase a TV as a monitor would be if you wanted something a little bigger than a monitor (monitors generally have a maximum size of 27-29 inches).
LG WRman Sherlock, out!