id say go with a galaxy. Plus very popular so will help you on takeovers.
start with a g2-12 and a keypad. Have a read of the install manual in the download area
look at the history, Gardiners and alarm express didn't want to take a new one cos of Scantronic pressure. That's why it started in the electric channels. They did show them in end but with hik and Pyronix plus new boys I wonder
bear in mind it's numbers. Very few manufactures limit it