I have subscription channels on my cable and have been using the EyeTV 610 for many years. It still works great - but I've now moved my program card to my Octopus Net device, so that I can get my channels on all devices. Unfortunately EyeTV don't support DVB-C tuning on the Octopus Net and this has forced me to use other software on my Mac mini, when I want to record on pay-channels.
I really hope that you would add support for SAT>IP Cable, DVB-C. I really don't want to leave you, but I may be forced to re-think and find someone else to dance with ;(