Hi Guys

I am renovating my house completely including rewiring and I thought it would be a good time to run the wires also for a home automation system and alarm. I am not loaded so I don't want anything expensive. I would really appreciate some advice as it is very confusing as there are so many different systems and protocols. I would prefer a system which can be accessed via one user interface but I am flexible.

I would like the following to be automated:

Security Alarm (something that will contact me when it goes off and with wired PIR sensors)
heating control (a Main control would be fine but if it is cheap to do each room individually that would be good)

Some optional things I would also not mind
Door bell
Door lock
Fire alarms

Any help would be appreciated.