Well I spent all morning thinking and researching and decided to go with a SW motech EVO tank bag. Based off the idea earlier in the thread about the Givi tank ring, I found out the SW Motech EVO series has a tank ring made just for the cargo seat rack that I'm using. The holes are already there. Since I already have 2 large bags for trips, I think the smaller "day pack" at 12x8x6 inches will be my main stay bag for daily riding. If I need to leave the bike parked, I can pull the lanyard and the bag pops off. With the ring on there, I can always get a larger bag in the future. If I need to do a longer trip or be out at night, I can strap on the motocentric bag on top of the ring and have all the storage I need for the extra visor, etc.