personally.
if you can don't go for wireless.
if you have to and you can get at least one cable from floor to floor near a power point
go for Galaxy Dimension, and fit with RF modules on AB line (RF RIOs Remote In Out units)
it aint cheap, but its very good, but also you will have to get a professional alarm company to fit it, it is not DIY equipment in any way shape or form.
if you can fit part wired part RF you can use the same kit, using a Galaxy dimension panel, you have a choice of circuits (zones) available to you.
this is just my opinion, there are others here that will add theres i should imagine,
get some some quotes from local smaller companies for your install, dont use the big boys they cost to much!!
oasis