I have been planning on upgrading my ultra 5.1 setup with a digital decoder and extra sub for some time, but now that I finally have the money it seems that Klipsch no longer carries either of these products. I was wondering if anyone out there knew of an affordable external decoder or maybe even a HT decoder? As for adding another sub, I have a sub from my old promedia 5.1 THX (amp burned out, had to get ultras as replacement) but I have not been able to find an amp that would work. As far as i know each cone is 4 ohm and I would need an amp that is stable to drive 2 ohms in the 150-200 watt range. Any help or suggestions would be greatly appreciated!