Was looking around in the automotive electronics section in Wal-Mart yesterday and I noticed that there were two models of Cobra radar detectors. One was the XRS777 and the other the XRS747. I was just wondering what the deal was with these. I can't find any mention of them on the Cobra website, or anywhere else for that matter. They're not listed on the Wal-Mart website. Are these just models that Cobra is making for Wal-Mart only? The 777 appears to be somewhat similar to the XRS9700 on features, but it does look different. Any info on these?