I have no idea what brand mine is, but here's some things to pay attention to -
My tail bag is not waterproof, I thought it was. That made one trip suck.
Not all gas tanks and airbox covers are magnetic, so be sure yours is when you buy a bag.
At speed, any bag attached to the bike is going to vibrate due to the wind, make sure your bag isn't making contact with paint otherwise it will rub paint off. Also look out for any stray straps, zippers, flags, etc, because they'll rub off paint too.
Saddlebags are the way to go, especially the fibreglass ones. Even better if you can score a luggage rack, the more things you can attach bungee cords to the better.
A good backpack that straps to you around the waist might be of pretty solid help too. I like having a backpack on cold rides because you can strap them tight and keep warm a tad bit better.
*edit* because Siray just mentioned some good stuff
get telescoping bags
and if you get a tank bag, make sure up at the front it has a strap that will go around your upper triple to keep the front end down just incase the magnets fail.
i personally love my Chase Harper Magnetic Tank Bag. It expands to fit a lot and compresess to lie low when at speed with a few things in it. It has a grip surface near the magnets so it doesn't harm the paint. If i go anywhere for a weekend i usually take the tank bag and a backpack, but i try to fit as much as i can into the tank bag. It has 2 main pockets, a smaller front pocket, and a clear plastic pocket to put maps or directions. It came with the purchase of the bike, so i'm not sure how much it costs.
The only problem i've had i can't really fix b/c of the bike. My Fuel Tank is basically a plastic cover covering a smaller metal fuel tank so it doesn't stay very well in the front, but luckily there is less wind there so it doesn't really move around much.