I have a slight rise on my road bike. I don't sweat it. Ride what is comfortable and don't worry about it. In fairness, if you are blowing by people on your rides, no one is going to think about your stem, but rather that you are a badass and teaching them a lesson. If the look bothers you, get something in between. On a road bike something like a 10 degree rise will be about horizontal while flipped. If with a horizontal stem you still need more rise on a road ride, you might want to rethink your frame geometry.