I suggest trying the amoco 93 if it's available in your area, Only because it made a huge difference in the way my bike ran, and was suggested to me by people on this board who really knew their stuff. It's not just the octane your interested in, to be honest, I don't know much about it except ever since I tried it, I use nothing else.
As far as my premix ratio, I've gone as lean as 50:1, but with the mx2t and amoco I can mix it at 32:1 (manufacturer's recommendation) and it runs great. Also offers better protection and more HP than a leaner mix.
I didn't have much luck w/ the blue cam2, and the mobil 93 really sucked. Sunoco 94 was ok. Most fuels and oils may change your jetting requirements, so try to find something that works for you, then you can stick with it and fine tune.
Congrats on the new bike and Happy Trails!!!!!!!!!!!!!!
Joe Chief