Do you want to get something done? Then move faster. A great way to move faster is to be more decisive. A great way to be more decisive is to stop gathering data and make a decision.
After all, do you really need more time to gather data? Or are you merely postponing making a decision? If not now, then when? Because the answer might end up being never.
Remember, the only thing worse than doing something and failing, is not doing something at all.