I am bidding on a system that I may use the 2-wire system. I am considering using a Hunter I-core with the 2-wire module. The reason I am considering 2 wire is while the initial system is not large it could potentially expand to a good size system. I've never worked with 2 wire so opinions on the Hunter and in general is appreciated. I've used the I-Core and like it so that is why I mention it.