I Ride: 2007 Custom ZX14, 2003 Honda VTX 1800C My wife rides her own ZX9
I have a set of ogio saddle bags and tail bag. all are expandable and fit pretty good. Sorry, no pics but you should be able to do a search for them to check them out. They're awesome bags and come with a lifetime warranty.
The Flight Crew, MC
Sir Flight Crew Leadin, 14 Blingin, Ragin Cajun Lunatic Post Whore of ZXF
It was about $100. from motorcyclegear.com . It doesn't rub on anything at all, it has velcro straps that attach to each other under the seat. It also comes with a net w/hooks for a jacket or helmet to go on top. the d-rings are attached to the corners of the tail bag for the netting.
I use a Kriega US-20, its waterproof, totally bomber and it has many lashing points for carrying extra crap and it tightens down very snug on the rear passenger portion of the seat. Its kinda tactical looking if your into that kinda thing, it holds a ton of crap to boot. Aerostich has them. http://www.aerostich.com/kriega-us-20-tail-bag.html
I just received my FastPack from The Cycle Guys and it is much bigger than I thought it was going to be, yet when not in use it folds down flat on the passenger seat like a seat cover. Velcro's in place nice and firm, and although they say not to use it as a seat, I can't see why it couldn't be used as one. Maybe they are stating this for liability reasons but either way, the bag is great.