Should I use Single() or SingleOrDefault() if there is a chance that the element won't be found?

What would you prefer to see?

try
{
  var item = list.Single(x => x.HasFoo);
}
catch(InvalidOperationException e)
{
  throw new InvalidOperationException("Exactly one item with foo expected, none found", e);
}

Or:

var item = list.SingleOrDefault(x => x.HasFoo);
if (item == null)
      throw new InvalidOperationException("Exactly one item with foo expected, none found");

What's the best practice here? Which one makes the exception more comprehensible?