You mentioned the mustache bars and I agree. I put some on my hybrid and it made a world of difference in the comfort level. For me the flat bar put my hands in a position that wasn't natural and caused pain in my wrist hands and forearm after a ride of eight to ten miles. I switched to the mustache bars and the more natural hand position and the pain has gone away and I rode close to 20 miles yesterday without any discomfort. There seems to be several hand positions also over what I had with the flat bar, and with the swept back design and not having to adjust hand positions as often.
I can ride as far and as fast as I want to on my hybrid and in comfort so I don't see the need for a change, and have been riding it for about three years now.