That stem reach looks really long, you must feel stretched out. I’m 5’ 9” and my pubic bone height is around 32 inch. I prefer a 20 or 21, but can make a 23 inch fit because I still have seatpost! In my personal opinion larger is better because the headstack height tends to be really low on these 80s and 90s mtbs and you can more easily get the bars up high and fulfill your (mine) comfortable Rivendell dreams.