For that kind of price, you should also consider a new Specialized Sirrus, or Trek FX, which are both Performance Hybrids. Still get decent ride, and better performance from the bike.

A 500-600 budget open up a big selection in the new Hybrid categories..... I never rode a Detour, but that Navigator is firmly entrenched in the comfort category, and doesn't do real well at longer distances, IMHO.