You may want to visit:
http://www.revenue.nh.gov/munc_prop/...elatedData.htm
where you can compare the tax rates for the towns you are interested moving to. Tax rates vary greatly from town to town . NH government agencies get all or most of their revenue from property owners including city/towns, counties and state.
Also, Vision Appraisal does many of the valuations for cities and towns in NH. This is another good resource to research comps.
http://www.visionappraisal.com/databases/nh/index.htm
Good luck in your search.