There was a great article in Consumer Reports that was sent to me recently by a colleague. Consumer reports ran some hypothetical scenarios where a person had the option of either investing or prepaying their mortgage by $100 per month. The results? You’re better off investing the money in the long-run. Check out their article here:
http://www.consumerreports.org/cro/money/credit-loan/prepaying-your-mortgage-3-08/overview/prepay-mortgage-ov.htm?resultPageIndex=1&resultIndex=1&searchTerm=your%20mortgage