well 1080 vs 720 refers to the horizontal lines being fit onto the screen. the more that are fit in the better the quality of the image you will see. I think it is important that you also take into account the hz (hertz) of the screen. Most of the lower priced tv’s are only 50hz which means that you could potentially see some stuttering when watching tv, if there are quick moving objects or wide panning shots. My opinion would be not to get the 720p. Take it back and get 1080p/i and try for 100hz. This will cost more $$$ but the results are worth it especially when you move into blu-ray movies and home theatre. Personally, i would not bother looking for a dual screen for you computer monitor. Because you then start having to worry about tv size and whether your pc can handle it. Also, the brand LG is perfectly suitable. It is well known here in Australia as a good brand.