My wife and I were once in the same quandary as you. I tried a 5-foot hose, thinking 7 feet is surely unnecessary for the OW diver, especially one of modest stature, but soon switched it out for a 7-foot hose when it became clear the 5-foot hose routing caused it to tug annoyingly on the reg in my mouth. The only way a 5-foot hose could be comfortable is if an elbow or swivel is used, and--someone correct me if I'm wrong--GUE doesn't like such kluges since they present potential failure points. You will be surprised at how, after just a few dives with a 7-foot hose, it starts to feel perfectly natural, and you start believing any shorter hose feels too short. The sh*t-eating grin you will get when you discover the beauty of the 7-foot hose is just one of many such grins you are in for. Enjoy the ride!