I think you could get the everything pack as suggested above for about the same price. That way you would also avoid a dvr fee for the 622's, which you dont pay on the 501. also with dishcomm you would only need to attach one rcvr to a phone line to avoid that fee.
As you are a long standing customer i think you will do fine with an email to CEO, they hooked me up and added a 211 without a single hitch.
Here's what i pay with a 211 also in the mix.
New Monthly Charge(s)
06/12 to 07/11
ADDL RECEIVER ACCESS FEE 6.00
AMERICA'S EVERYTHING VALUE PAK-AMERICA'S TOP 250,4 94.99
DISH NETWORK DVR SERVICEFEE 0.00
DISHHD 20.00
DISHNETWORK ONE RATE PRM 0.00
LEASED RECEIVER FEE 6.00
PREMIUM PACKAGE LOCALS 0.00
Account Charges $ 126.99
so if you take out the addtnl rcvr fee you will be at 120.99