I have been with my lifetime Tivo since 2001, and I have one more that is series-1, and two that are series-11.
The main advantages with the DirecTV Tivo unit, besides that there is no compression, is that it is a pure digital recording. It records the digital stream that is coming down from the satellite. This means that there is only one quality and the amount of hours you can record, do not change as they do on regular Tivo, who gives their speified time at the worst resolution. So when you boost the quality, you cut the total time down. No so with DirecTivo, or Dish DVR's. If you go with an outboard Tivo, it can be used on any DirecTv, or DISH receiver. The Series-II gives you Tivo2Go at your desktop and network support, but you must purchase the network adater, and if you want to usethe best part of the Tivo neworking, you ned two Series-II Tivo's. The two Series-2 Tivo's can talk to each other, and let you want anything from either, in either location. I think that the Dish 625, alone, beats Tivo in this one area.To put a Tivo on a Dish or DirecTV DVR makes no sense, but you could do it. I have my lifetime Tivo hooked to my 322 Dish receiver. The other Dish receiver is a 625 DVR model. How does the 625 compare to Tivo? As all Tivo owners will tell you, nothing works as good as a Tivo. So while I like my 625 as a DVR, it is no Tivo by any stretch. It is Duel room, duel tuner, duel DVR, and is a pure digital recorder at 100 hours of perfect recording, so that makes it one great receiver. I put two Tivo series-II out of business when I got the 625.
I would have went with DirecTV to get the DirecTivo receiver, but at 4 rooms, they were $25 higher per month than Dish. The price difference gets reduced when yoiu go to less rooms because other than the Directivo receiver, DirectTV is inferior to Dish. DiectTV used Mpeg-1.5, Dish uses Mpeg-2. Dish has many duel room recivers and supplies two remotes with them, one IR, one RF-UHF. Their receivers work perfectly. DirecTV can't do two rooms on one receiver yet, MAYBE they have one planned for the future. Dish has had then for a long while. Dish, who is Echostar, has been in the Satellite business far longer than DirecTV has been around.
So now for the best deal I've seen yet. There is a Dish receiver that is HD, and it is a DVR, but was costing $699 to get it. It was not available for lease like many other receivers. Last week, Dish started offering the 942 for a $250, one time charge, for a lease when you order a new Dish system with HD. Now, if you keep that 942 for the 18 month term, it would have lost over $250 of its value by that time. So this is a good deal if you need HD. Also, if you have Dish Club number, from me or any other Dish customer, Dish will start you off with $25 off of your first bill. They also offer you the pay channels for a few months to try them out. You only have to cal and turn them off if you don't want them after the 90 days passes. Tehy will tell you the excat date that the free period ends so you can mark it on a calendar. If you want a Dish Club number, email me and I will send you one. Good luck on making the best choice.. JM