I'd say it depends on your priority. In my case my main concern was being able to comfortably draw the pistol, and for that reason I chose a horizontal carry (with the muzzle of the pistol pointing behind me). Since you seem more concerned with printing you may be better off with a vertical carry, which in most cases will have the muzzle pointing downwards.
Try taking your pistol in your strong hand and holding it under your weak arm in various positions, basically imitating the place that your strong hand will have to go to access the pistol's grip in order to draw it. If you have no trouble with a vertical orientation then you are set.
I would recommend against the type of shoulder holster that uses only a strap of leather or fabric under the arm opposite your pistol and suggest that you go instead with one that is offset on the opposite side with either a pouch to hold spare magazines or at the very least a tie down with would either clip to your trousers or loop through your belt, unless you only carry a very small/light weapon.
I think you will be very happy with either the Sleeping Dog or the Master's from
JBP Holsters, and at $86 and $116 respectively, the prices are hard to beat for quality leather gear.