My current setup is a Dish 500 with a Quad (legacy) LNB connected to a 501, 301 and an older (legacy) JVC DSR100U. I'm getting a 721 so I can retire the DSR100U. Will the DP Quad buy me any improvements or should I just save the cash and stick with the current LNB? Eventually I'll take the plunge into HD programming, but that's not currently in the cards... There are a couple of (possibly) decent deals for the DP LNB that I'm watching on Ebay, so I'm curious and interested.