Thinking of buying a Shinco SDP - 6820 or 1850 or 1720A? Apart from the obvious screen size difference is there anything else to distinguish them apart? Also, has anyone had any problems playing back DVD-R on Shinco? My Panasonic DMR-E50 played -R fine but an LG player I have won't, and the PS2 tends to do as it pleases. I want to buy online from Allcam but as I'm unable to test it out not sure what to do because haven't heard of this make available on the High St. Help or advice anyone??