So, after looking at several alternatives to Elk, it seems that a DSC PC1864 with envisalink to integrate to a separate automation controller (e.g. homeseer) might be a reasonable substitute. Or perhaps Honewell Vista.
Qolsys IQ panel 2+ while being more modern (than for example DSC PC1864) and having wifi connectivity does not appear to offer any integration ability ? The wifi connectivity is used to link to a monitoring company only, it appears, and does not offer an API to implement integration.