The debate between a target dot and a fine crosshair goes on, personal preference and the visual acuity of each individual.
Scopes are more of a budgetary decision. Weaver T36 and Sightron 36X on the low end. Older Leupold 36X scopes in the middle. Leupold Competition Series, Nightforce BR and March on the upper end. Power is, again, a matter of personal preference and visual acuity. 1/8 MOA clicks for elevation and windage is the key feature. Better optics and the robustness of construction is what more money brings to the bench.