After the advice of a couple members, I took the Busa to a shop that had a nice selection of tank bags. That involved a 2 hour trip to a place called Competition Accessories. The dealerships around me only have bags for cruisers(not a big market for sport bikes in my area) Anyway, I ended up with an OGIO brand bag. The base is magnetic and also has straps for under the tank. It also has a clear pocket for a map. The bag zips to the base, when seperated from tank the bag has backpack straps. Bag is expandable. Without it expanded I fit a sweatshirt, 4 cans of Pepsi, 2 subs from Subway, a carton of smokes, Oakley case, cell phone, pair of Oakley's and kickstand saucer. Needless to say, I love the bag. It was exactly what I was looking for. All leather with a rain cover. Also has a port for my XM radio wires. Havent gotten the XM yet but its coming soon.