I am in the process of purchasing a slightly used, less than 10 shots fired, SBE 2. From what I have read on this forum as well as others these guns are much more accurate with optics. I am accustom to using open sights on my current BPS and would like to know, A. Should I put optics on this gun? and B. If so, then what type and brand should I get? I am open relative to cost but would like to have a quality optic that is accurate, reliable and will take a beating and keep on ticking. Thanks in advance for your advice.