Hey guys im new to the forums to be easy on me 
I just purchased a home where i want to install a home automation system. The home was built in 1972 and currently has a wired honeywell Ademco alarm system with door, window and motion sensor in the house. I have begun installing Intermatic Z-Wave 3 way switches and lamp modules. My final task is to combine both of these items together with a desktop pc that i will be using for both this and some IP cameras that i want to install.
Im hoping that i can get recommendations from the community not only for a replacement/addition to my alarm system to allow its devices to connect to the PC, but also a way to control both the alarm sensors and the lights in a seamless way, where one is able to trigger actions on the other for the least expensive price.
Thank you all.

I just purchased a home where i want to install a home automation system. The home was built in 1972 and currently has a wired honeywell Ademco alarm system with door, window and motion sensor in the house. I have begun installing Intermatic Z-Wave 3 way switches and lamp modules. My final task is to combine both of these items together with a desktop pc that i will be using for both this and some IP cameras that i want to install.
Im hoping that i can get recommendations from the community not only for a replacement/addition to my alarm system to allow its devices to connect to the PC, but also a way to control both the alarm sensors and the lights in a seamless way, where one is able to trigger actions on the other for the least expensive price.
Thank you all.