I'm running a setup exactly like that, with no issues at all. In fact, I try to route the cables front and back, near the top, to give me a "flatter" top bar. I ride the drops most of the time, but if I'm resting or eating/drinking, I kind of like the "flat top."

Also, on the Cinellis, which I prefer, it's pretty hard to find double-grooved bars, in my size, when I need them.