Jason,
I feel your pain. I also have, what was up until last weekend, an unadulterated SM. I like the look and wanted to preserve it. But, I had the same problem you describe and needed some storage space. Contrary to most, I do not like saddlebags - Hard, soft, permanent, or removable - I just don't like the look. So I broke down and got a sissy bar and rack after a year of wearing a backpack, having my pockets bulging and being caught without what I need. My hope is that I can strap on enough stuff to suit my needs. I'll be looking for a good roll bag and backpack. All I’m looking for is storage for long single day rides and the occasional overnighter. If that doesn't do the trick my next option will be the Easy Brackets, but I really don't want to go there unless I begin to entertain thoughts of weeklong adventures. Whatever you decide, there certainly will be a marked improvement in being able to go longer distance for the price you pay in changing the general appearance.

Barry