the main concession to front bags is lower trail/more rake. Without the bag it makes the bike a little more of a handful to keep on an exact line. It has a nice, lively feel to it though. You should be able to tell that the bike has a little more rake than the 43/45mm you see on most bikes.
Depending on the mounting, it may be possible to have the cross brakes on the tops of the bars. The brifters with the cables going out to the side are pretty much a no-go. If the bike comes with cantis, you should be able to mount a rack.