When i watch my divx/avis from a external harddrive - the picture is not smooth. when i select Native picture it seems ok...but when its on stretch, normal or anything else, the picture become sluggish. It gives me a slight headache. im using an elite set on 1080p on my sammyF using hdmi. On the other hand the same file runs fine on my ps3 (also 1080p). Really smooth, not as blocky...no problems. Is this because the 360 upscaling abilities are poor (compared to the ps3)?