New guy here. I'm seriously considering buying a Dish Tailgater antenna along with a receiver. I was planning on buying the Wally receiver, but Camping World is offering a promotion for a Vip 211z for free with the purchase of an antenna. What are the differences in the receivers? I understand the basics, like Netflex and the IR remote, but is there anything else that is worth not taking the free Vip receiver? Thanks.