That is exactly what I did. I use Harmony remotes, so the glo remote wasnt an issue, nor was a moca adapter included with the XL. I just ordered the $249 Tivo4, and a 2TB Seagate 7200 rpm drive off Amazon. I like having the original drive stored for emergencies anyway, so this was the cheapest route I could find for a 4 tuner, 317 hour box...and with the original drive unused and stored, the PLS should last quite a long time. The power supply looks to be easily repaired or replaced should it fail. Ive had good luck with Tivo's anyway. Still have a Phillips series 1, and a Sony Series 1, both with PLS, still in use in the guest room using a Comcast DTA. Its SD only, but for the guests, its good enough for occasional use.