Thanks to those that had the time to reply to my original question. So seems like I should save myself some unnecessary wasted time and expense and stick with the Premier 24, and perhaps look into adding a com-ip module (but I would first need someone to put the module into a premier 48 control panel to program it).
I think I'll keep exploring this topic to see what other possible options could be. It does amaze me that there are not more 'smart' alarm systems on the market, combining secure web based technology with best in class hard wired control panels / configurations, at an affordable price .... surly a massive gap in the market?!
I don't like anything that's wireless (be it wireless sensors or a wifi module), its still very unreliable and in my opinion easily exploited, so I would steer away from that, but a hardwired system with encrypted web / VPN access would get me excited!