For the difference in price between the Gold DL AMEX and the Reserve DL AMEX, you may be able to get enough MQM's by just upgrading. That would be $450 or less.
Or you can do go the route of the Plat AMEX charge card, get 50,000 points, convert it over to get the 25 MQMs. Cost for that would be $450. (Both are covered in depth already...just do a quick search)

Of course, if you already have a Gold Amex card you get your bags checked free. And if you are only traveling for pleasure I don't know that you really need Silver. But your question "is it worthwhile for me?" is one only you can answer. The better question to ask yourself is, do you want it? Your answer to that will determine whether you go for it or not.