A little late to the dance, however, Antero is a local riding buddy. I believe he went with the Rotella T6 oil. I will add my choice to the list here.
I have been using Yamalube Semi Synthetic 10w-50 motoroil in a couple of KTM's, including my 950. I had used up a couple of cases of Motorex, and have no quarrel with that oil, except price. I have been ordering Yamalube in gallon jugs, at about $30/gallon, of sufficient quantity, from Rocky mountain mc/atv and get free shipping. The yamalube is Jaso MA, is of the viscosity recommended in the owners manual and seems to work just as effectively as Motorex.
I routinely run Rotella in other bikes. I have also, when it was all I could get at the moment, used Motul semi-synthetic 15w-50 which seemed to lubricate just fine in our hot summers.
Lots of good Jaso MA moto oils out there