I currently have 6 HD DVRs (12 tuners) and 1 HD receiver. I am interested in getting the Genie to replace my 1 HD receiver. Will this be too many tuners as the 5 from the Genie will put me up to 17? Can a setup have more than 16 tuners? I know I could also replace an HD DVR with an RVU unit, but I would hate to get rid of an HD DVR, since I had to pay for it to get it in the first place.