Everyone has an opinion, and each is entitled to thiers.
Here’s what I would do.
There really aren’t any super-duper Hard Drive manufacturer’s out there. I like Western Digital this week, and here’s why.
They make 3 ‘grades’ of hard drive.
Green - Great for USB external drives, energy efficient, quiet and CHEAP
Blue - Probably what most PC makers install. Middle of the road drive, about $10 more than the Green, 3 yr warranty
Black - their ‘Best’, about $10 more than the Blue, 5 yr warranty.
I HATE it when a drive crashes, so if I delude myself into believing that $20 extra will buy a ‘better’ and more ‘robust’ drive - then so be it. I will gladly drop that extra $20 in the unfounded, undocumented, non-evidence supporting belief that I’m getting a ‘better’ hard drive.
Performance-wise, the Black is ‘faster’, and the 5 yr warranty from Western Digital is better than the Blue.
Your box, your money, your time ... just my 2 cents. BTW I got a 1 Terabyte drive from Best Buy for ~$100.
Memory Chips are very sensitive to static electricity.
Unless you are properly ESD grounded, you may destroy your RAM. About the only physical thing you can see, anyway; is if the RAM sticks are properly installed.