keep the SC. it sounds like you just have normal wear items. the cost of these repairs is well below the cost of a new car. assuming that your SC is paid off, these repair costs would only equal 2 or 3 monthly payments on the new car.
i won't attempt to give marital advice, however many men have found that it is impossible to make women happy, so you might as well have a car you like. just my 2 cents worth.