Just got my replacement monitor which is an A07 (previous one was A04). After looking through this thread for settings the posts regarding calibration tools are making me think it's about time I had one. As someone who just mainly games is it worth buying one? If so, would the ColorMunki Smile and Spyder5 Express (about same price to buy) both be adequate for me? My eyesight is not 100% and slowly getting worse in my twilight years