I am looking to get a new bike mainly for fitness. I have tested several bikes from several dealers and like a couple by KHS (Specialized Sirrus was impressive too). The local store recommends the KHS Urban Xpress to me for its disc brakes and good components for 569. They also have the Vitamin B, which has a carbon fork. I am leaning toward the Urban Xpress but was wondering if I might be better off with the Vitamin B. It is not much more and will be lighter. I will be riding 100% on road.

Vitamin B:
http://khsbicycles.com/bikes/2012-khs-models/vitamin-b/

Urban Xpress:
http://khsbicycles.com/bikes/2012-kh.../urban-xpress/

There is not a whole lot of information and reviews on KHS, especially the Vitamin line. Any feedback would be greatly appreciated.