I have a 42" LG Plasma that I bought about a year ago. It is HD ready and not FULL HD which means the maximum resolution it can output is 1080i. I have a Playstation 3 hooked up to it to play games and watch Blu Ray movies and I think its just fantastic. There is a very small difference between the full HD 1080p and the HD ready 1080i. U cant really make it out unless u see it very minutely. There's just one problem...burn-in of images which is easily corrected with a DVD which I bought called "Pixel Protector". So, bottom-line, I'm very happy with the plasma. I would advise you to have a look at the two technologies and decide on what pleases ur eyes the best.
My 2 cents...