IMO it depends if it's a watch you want to wear or one that you want to sell. In the first case the resale value isn't a criteria and in the later, well maybe you should consider buying some S&P 500 stock instead.
I have two watches that falls in the category of summer watches. The first is the Islander ISL-68.
The other is the Seiko SNA411 Flightmaster once I put it on the yellow rubber.
That's because the chrono module has only power for an hour, but they could have used the sub-dial for something a bit more useful, like un slaving the hand and using it to track another time zone for example.
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