Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why would a long-term investor ever chose a Mutual Fund over an ETF?
http://www.efficientfrontier.com/ef/104/stupid.htm would have some data though a bit old about open-end funds vs an ETF that would be one point. Secondly, do you know that the Math on your ETF will always work out to whole numbers of shares or do you plan on using brokers that would allow fractional shares easily? This is a factor as $3,000 of an open-end fund will automatically go into fractional shares that isn't necessarily the case of an ETF where you have to specify a number of shares when you purchase as well as consider are you doing a market or limit order? These are a couple of things to keep in mind here. Lastly, what if the broker you use charges account maintenance fees for your account? In buying the mutual fund from the fund company directly, there may be a lower likelihood of having such fees. I don't know of any way to buy shares in the ETF directly without using a broker.