I thought I'd chime in about considering ICF construction as an alternative since it is now cost competitive with wood framing. ICFs are insulated concrete forms and have many benefits including the following.
1. Thermal Mass Benefit - Provides more even temperatures with lower demand on the HVAC system. This means more comfort, lower utility bills and longer equipment life for homeowners.
2. Fire Resistance - Concrete obviously doesn't burn and the foam isn't flammable.
3. Air Sealing - Achieves better blower door results by reducing unwanted air leaks through the walls.
4. Durable and Solid Looks - Thick walls make homebuyers feel like the home is built to last.
Happy to chat with you more about my personal experience with ICF construction as well!