I use a Cortech magnatized bag mine is the super mini but you can go two sizes up larger for more room. I use a cortech sport tailbag for most of my shit though it holds enough for a weekend trip no problem. Since you have underseat exhaust on your 06 you can probably get the cortech sport saddlebags they hook into the tailbag. I got side exhaust so it would melt them. Not posititive how the saddlebags might work but you would have a chance I would say.
I just bought a "magnetic style tank bag from a fellow on EBAY.His seller name is "digicam11" .If you type in #190087255782 once you are on the ebay site,you can have a look see. Check his other stuff out, he also has soft saddle bags in 2 different sizes. Check this guys stuff out ,it looks pretty good and it`s reasonably priced,(I ended up paying $64.00 US including shipping) for his "GT-27 Tank bag"). GOOD LUCK !!!