I bought an Acer laptop from Walmart.
Acer Aspire E5-575-54E8 15.6" Laptop, Windows 10 Home, Intel Core i5-6200U Dual-Core Processor, 6GB Memory, 1TB Hard Drive

It has a 2gb and 4gb memory module already installed.
I had planned on taking out the 2gb and replacing it with a 16gb stick, but is that more than is needed if I'm not playing memory hungry games?
Amazon has an 8gb stick for $31.99 and a 16gb stick for $51.99. If it were you, and you're not exactly swimming in disposable cash, which would you select?