You are best just to keep that dish that you have up and put the dish up that you are going to receive just for your 721.
The 721 does have a bug with the dishpro where it will lose the 110 or 119 satellite about once or twice day and you have to reset it, so you may be better off using the nondishpro lnbf for the 721 until the software is released fixing that bug in an upcoming software update.
The 721 does have a bug with the dishpro where it will lose the 110 or 119 satellite about once or twice day and you have to reset it, so you may be better off using the nondishpro lnbf for the 721 until the software is released fixing that bug in an upcoming software update.