In the three laptops I have (Asus, HP and MSI), the main drives are Samsung M.2. In my second PC, the drive with Windows installed is also a Samsung M.2. So yes, I can recommend Samsung M.2 because I haven’t had issues with them.
M2 drives are so fast that an average user won’t notice any difference in games. I was in the same situation as you - choosing between a M2 Gen 5 or Gen 4 drive as an additional drive. I went with Gen 4 and put the money I saved toward the FCU from Winwing.