Welcome aboard - I bought a 990 SMR over Memorial Day weekend and had to sell a few bikes too, but I kept my KLR
My owners manual mandates premium, you are allowed to run 1 tank of lower octane fuel in a pinch but you have to pull the seat disconnect and pull a wire that I believe retards your timing.
My first oil change wasn't bad, the filter was on the left side and there were 2 screens, one on each side. Everything was pretty straightforward except the oring for the oil filter cover was pinched from the factory and damaged. Since I was going to the track the next weekend I cleaned it up and tried to reuse it, but it leaked like a sieve

. No KTM dealers, or hydraulic shops, around on a Thursday nite, so I drained the sump again and found a smaller thicker oring and stretched it - bingo, no leaks. The dealer has since sent me a new one for my next change. If it hadn't been for that the oil change would have been 30 min.
I bought a SW Motech aluminum rack from Twisted Throttle so I would have a place to strap on a soft bag. The fuel tank is plastic so a magnetic tank bag is out. They also sell a plate that snaps unto the rack for soft bags, they also sell different adaptors for the various hard bags like Givi, etc.
I have a set of Leo's coming next week, I'm pretty happy with the factory mapping so these slip ons won't require it to be changed. The Akro's sound sick too!
Here's a couple pics, you can just barely see the rack I installed. Enjoy your new ride!
Well, I guess I don't know how to attach a pic from my iPad, I'll post some up later today with my laptop