Late to the party but I'd also give a thumbs up for Givi. I inherited a case on a used bike I bought, and while it had some aging issues including a problem with the lock it held up for several years of regular use on multiple bikes. The first time my brother borrowed mine on a trip on his VFR he was hooked, and had one ordered quickly. I since bought a newer one that is lighter and a bit more compact, necessary to avoid overloading which caused a bracket to crack.
Regarding RKA, I too recall hearing that they may be going out of business or looking to sell. I have one tank bag from them that is pretty good, but I have to say it was not as good as an older model of the bag I had borrowed from a friend before buying this one. (Fewer features, rain cover was extra and not very waterproof.) That was a purchase maybe 10 years ago that I haven't used much since. But that is very common these days, "they just don't make them like they used to". I have also had pretty good luck with an Eclipse tank bag, as well as a Tourmaster magnetic tank bag that fits several of my bikes well.
