Aside from the exchange of an O/U for a SXS, I'd suggest you develop a purpose for the SXS. That purpose will largely direct you toward a suitable SXS. Measure the weight and balance of your Super. Now, consider the handling as you feel it. Ask yourself if you want lighter weight, differing balance point, and/or faster swing. Consider the weight and balance of a BSS in its various configurations. Does it meet your needs? If not, what might?