I've just brought this DVD recorder today. I got it coz i need a dvd recorder plus i wanted something that can upscale DVD's to my new 506XDE. But reading the manual online, i see it only does max 576p. Will i notice any difference? Do i need 720p or is 576p fine? Is there an alternative that have HDD recording and upscale capabilities to 720p or will the 506xde do that itself?