I've just been through the same process you're going through, looking for an alarm system that would interface with Homeseer. I looked at quite a few panels, including this one from TLC and decided, in the end, that only Comort through it's Homeseer plugin gave the level of integration I was looking for.

I've just installed it and contrary to a lot of peoples opinions, I found the programming fairly straightforward, although I'm not using it to anywhere near the level of complexity it's capable of - all that is done in Homeseer !