I dont know if you are going to listen or not, but an R1 is an extremly bad choice for a first bike. That bike has more power than most people know what to do with. It will easily spin the rear tire without any provocation. And you havent had and a**hole clincher like the one that comes from a spinning rear tire in a corner. If thats not enough, it will easily lock the rear tire when you downshift.
That said, as to your questions. With a exhaust (full system, slip ons dont really add power) and a programmer, you can expect the top end power to go up 7%-10% in the peak. You will loose power under 5-6k rpm in return. The bike a 4 stroke and acts like one. There is a good deal of power starting from about 4k, and at about 8k the engine starts ripping like a rocket. You can easily float the front wheel thru the first 3 gears on acceleration.