SONY 51 INCH BABY Went to four different stores, and I have to admit, it was Tweeters (eventhough I waited forever for assistance) that told me of the newer model. All is pretty much the same except for the some cosmetic differences and this MIDX circuitry. Not sure what it is but it's the same price as the older S510 model. Tweeter also fed the HD signal through it and I was impressed. So far it looks like Circuit City because the salesman said he would give me a deal if I buy the Samsung Upscale DVD player with DVI out. Thanks for all your help I should be ordering this baby in about 2 weeks for delivery.