I will soon be the happy owner of a brand new 2015 MTS. I will go for the OEM case. Main reason is that I will be able to use only one key for motorcycle and top case. As for the rest, aftermarket would be more or less the same price. In any case, I think the OEM is very likely to be a Givi with Ducati logo.
I have the 2014 Grantorismo which comes with the factory top case. Perfect fit and Givi makes it. But you can't get parts for it from GIVI. Go online and checkout and download the GIVI catalog, they have many different configurations and prices are very good. There is nothing wrong with the stock unit. It's a solid performer plus the key will fit it. If your goal is to add more rear lighting or brake lights for visibility, the GIVI units can be optioned to do just that.
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