how you're setting up your bars is fine. it's always good practice to leave a few cm of spacers above the stem for different set ups as well as resale value. as far as positioning, take in to consideration if you will need a longer stem to get the reach you want with it flipped up or re flip it so that it is back to a neutral-ish position but move it back up on the steerer tube....so on and so forth. it takes a while to dial in positioning. then you may also want to adjust saddle height. have fun.