Sounds like you got a nice deal on your bike. The more you ride, the more it will grow on you.
Let me offer an opinion that may save you a few dollars that can be spent of gas. Four hole injectors may or may not be in the snake oil category of Motobrick parts. Some have found them to make the bike feel like it has more power, others have not. So far, despite being around for a number of years, there is no dyno data on what they can do for a Motobrick. Personally, as long as the bike is running well, I would hold off on them until there is some good dyno data.
Second, when these bikes first came out, there was hardly any coolant being sold for aluminum alloy engines, so it was critical to use the expensive BMW magic elixir. Nowadays, with nearly every car having an aluminum engine that has to meet EPA specs, most coolants are formulated for aluminum blocks. I use Peak Long Life in my bricks mixed 40/60 with distilled water and so far have had no problems. It is readily available and often on sale for less than half what the dealer charges.