Expanding Past 4 Outputs from my dish - DirecTV DVR

For Expanding Past 4 Outputs from my dish, relating to DirecTV DVRs and receivers. I have a dual LNB oval dish with 4 feeds coming off of it, I would like to buy a multi switch to expand beyond 4 outputs. I was considering the 5x8 Eagle Aspen S-4180 GX+, but I also want to be able to use the same multi switch when I upgrad my dish to an HD dish down the road, so I am also considering the Zinwell 6x8 multiswitches, but I am not sure which one to get, there are two that seem similiar: the SAM-6802 and the the WB68, whcih one would work?