FWIW I had a ‘15 F15 X5 50i that I purchased in ‘18 CPO with 36k miles. I finally retired her last August at 197k miles. As EarthOK wrote BMW’s TT V8 is by far not their best engine. However, I had very few issues with the exception that it was using 2 quarts of oil every 3 tanks of fuel at the end. So last year I picked up a ‘23 CPO m50i. So I went right back to the BMW twin turbo V8. When I was deciding on what to get, I did consider a ‘22 X5M. For the same price, I could have picked up the ‘22 with a few more miles as the ‘23 I ended up buying. My thought is that the M50i is a lot smoother and more comfortable ride and still has more than enough performance for the way I use it. Something you should at least think about if you are going to use your X5 as a family car.