I'm thinking about upgrading my alarm to the Viper 791 XV and wonder if anyone is already using this system? If so, how do you like it? I'm mainly getting it for the remote 2 way paging since I currently have battery backup siren, glass break and shock sensors. (The LCD Keyfob is hella kool.) Also, are there any DNE hook ups for purchasing car alarms? I can install it myself so really only need the unit but can go w/ installation if price is right. Thanks for reading.