I am not sure what you can do with the T2X and Tivo that you cannot do with C4 and Tivo. I have integrated lots of Tivo with C4 and never had any control limitations.

Another point to bring up that is on my mind recently is remote cost. We installed an Elan system recently for a family with lots of young kids and a house full of tile and hardwood floors. Well the call came. Kid dropped the remote and the screen cracked.

Not sure yet if Elan can just send a replacement screen. If not, then they are buying a new remote for ~$870. Nice, eh? The SR260 is $200 MSRP. Not a hard pill to swallow when your kid/wife/dog/babysitter/drunk friend/whoever drops your fancy remote. :)