As some people mentioned above, if your planning on riding the rails to trails type trails in Wisconsin 45mm is complete overkill. I live in Madison and ride many of the trails in central Wisconsin on a Trek 7.5fx with a carbon fork and 700x32 tires, any wider tire is not necessary. If rails to trails & paved riding in your thing id give some thought to a Trek FX or a Cannondale quick series bike. I definitely recommend against getting a suspension fork, it will slow you down to much and you dont need it on Wisconsin's excellent trails.
If your looking for trails to ride in central Wisconsin check out my blog, i have maps, mileage charts, photos, etc for many of the trails in central Wisconsin.
http://bartsbiking.com/