So sorry! I haven't been on here in ages and just saw your message! I would recommend the Bagster tank cover/tank bag. If you search the forum you'll find some pics of my setup. It's nice, but pricey. The tank cover is matched to the color of the bike, even having a carbon-fiber look to it.
I think I paid around $500 for the whole setup, ordered from a UK vendor that I don't recall.