You may want to post this question on the Homevision message board.
Or if you want I can post it for you, if you don't have a yahoo login.
I still use my Homevision, its now been going for about 5 years or so, without any problems.
Its still going strong, and the message board is very active.
Idratek is a very capable system and definitely worth a look. And you may be able to hook up your HV box to the Idratek system.