I just signed up for Dish network, I have a Superdish and the 510 DVR receiver... I keep seeing the commercials for Dish network and there's these brand-new looking DVR's on there and the one I have looks like it's been around the corner a few times. I'm told mine is a 510 model, which the installer said "isn't being made anymore"... On Dish's website the new-ish one that I was hoping for is a DVR 625/522... what's the deal with that? I'm a techno-geek, and I was hoping to get that one because it was the newest/latest/greatest thing... why did I get some "old pair-of-shoes" model???