Personally I am into maximizing my return so for each system/strategy I use I keep track of all the divs for both win and place and then simply examine the return on both. In all cases (so far) I have found that the win return is far better than the place return so I bet Win only. Personally I wouldn't go E/W UNLESS the return on the win and place was basically the same.

For example the long term returns of one of my current approaches gives a Win POT of around 20% but the place POT is only 5%. If I bet win only I get the 20% return but if I split the bet equally E/W then I only get 12.5%

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"Computers can do that????" - Homer Simpson