In the end, it's up to you and depends on your specific goals, lifestyle, and budget. If your goal is to get as large and muscular as possible, and you have intense weightlifting sessions 3 times a week or more, you're a perfect candidate for using good weight gainers. If you're trying to stay in shape and be toned and lean you might want to think twice about using weight gainers, as a pure protein might be more up your alley.