Which brand is best for gold coins?

When it comes to investing in gold coins, which brand should I choose? Are there any specific brands known for their quality, purity, and reputation in the market? How do I ensure that I'm getting the best value for my money when selecting a brand for my gold coin investments? Are there any red flags I should be aware of when it comes to counterfeit or low-quality coins? Can you provide some guidance on how to evaluate different brands and make an informed decision?