Hey fivecoat
What's your BP like?
I'd definately drop your blood sugar down regardless of the ED benifits. Most likely you'll see more regular function in general when you're blood sugar is normalized which means ED treatments, cialis, Viagra will be more effective and more predictable.
I'd be hesitant to pursue herbal remedies for ED. Their effectiveness, drug interaction and long-term effects are vastly under-researched and under-reported. If you're interrested in a natural medicine talk to your doctor about it or consult with a licenced naturapathic MD.