A cx bike would certainly do the job. My preference for commuting 10 miles or less urban is a hardtail/stiff fork mtb w/1.75 street tires. The smaller frames are more responsive. Having ridden both a rb and an mtb alternately for a few months I settled on an mtb as described. Rode it for 5 years. My current rides are a cx and fg, but I live rural w/a 40 mi rt commute. Some people aren't bothered by drop bars urban. My experience was a feeling of more overall control and better reponse time to situations w/flat bars.