Currently I have a 722 VIP, and comcast internet (+ basic channels). The moron who built my house thought RG6 splitters in the wall would be a GREAT idea... So I am using Holland DPD2's diplexers (http://www.satpro.tv/Holland-DPD2.aspx) to merge the dish and comcast signals at home entry... then splitting them again to my 722 and comcast modem. Was thinking of upgrading to the hopper for additional tuner and updated software and storage space. I know these diplexers will cause problems with Joeys, but we only have one main tv and do not plan to use joeys (the other uses cable basic channels and rarely used). Does anyone know if the diplexers will have issues with just a hopper?