While I do like the M&P 15-22, I looooove my Mark II Tactical. Great shooter, easy to clean, and affordable I picked it up for an inexpensive way of improving my mechanics, and as it turns out, it's also a blast to shoot. Being a bolt-action, it really does slow you down and allows you to focus on each individual shot. If you get to that point, you can even take it to 100 yards with the right ammo.
Should you go the bolt-action route, try to find one with iron sights. Iron sights are a lost art but learning how to shoot with them is a must. Optics break and/or lose zero, it's a fact of life.