I put an older Manitou 700c fork on my cross bike. After racing with it (too heavy and not needed) and road riding with it (fork dive while cornering at high speeds) I removed it and went back to a steel fork. CX bike works well on the road. I run Ritchey Speedmax 30s which are semi slicks and fairly quick on the road, but do well on gravel, dirt etc. The Mythos 35s are GREAT tires, but I wouldn't run them on the road, due to speed penalty, weight, and fast wear of knobbies on pavement.
IMHO you will not want the weight and motioin of a suspension fork when you are riding mainly road. A cross bike does farily well off road, almost like riding MTBs in the late eighties before suspension.