I will be happy to send you comparison stats between Sonoma and Napa. It is about a 4 page document so I would need an e mail address to do so. It is a very indepth comparison between the two towns.
All the best,
I know that alot of times people don't really consider how much the weather will affect them, but one of the things you might determine is what you are comfortable with physically... there are so many 'micro-climates' in both areas and if you prefer cooler mornings or warmer days and nights, etc, you want to seek out those areas where that weather pattern will 'suit your bones'. There is something for everyone here when it comes to weather!
I would welcome the opportunity to help you with the financing regardless of which area you settle on as it helps to work with a local lender who really knows the areas.
Happy home hunting! You will love it here!