<p>As the OP, you have no obligation to decide what is the "best answer". After all "best" needs a definition. What should matter to you is select an answer that is useful <em>to you</em>: You may receive a highly sophisticated answer, totally correct, insightful, brilliant etc etc etc. It may be an answer to admire -but it also may be partly or wholly incomprehensible to you, which in all will make it  </p>

<p><strong>a)</strong> <strong>useful in general</strong> as an on-line repository of knowledge<br>
but<br>
<strong>b)</strong> <strong>useless <em>to you, for your immediate concern.</em></strong></p>

<p>In such a case, I would suggest to let the upvoting of the community reflect the answer's "quality and value", but keep your green mark and your bounty for an answer that you can actually <em>understand and use</em>, and not just admire. In this virtual market, the OP is the customer and the answerer are the suppliers: if what you need is bread and I provide a sophisticated French plate, my offering is high-quality, and of higher value than a bread-answer (I love bread, by the way), but it is not certain that it will go well with your stomach. After all, an <em>efficient</em> supplier is a supplier who understands what the customer can digest, otherwise he risks turning himself into a participant in a beauty contest.</p>

<p>@Glen_b's suggestion that the green mark and the bounty need not necessarily go to the same answer, is also a good policy advice, IMO.</p>
