The part you would spend a little more on next time

Not asking for the fastest part. What did you cheap out on that became annoying day to day?

Monitor stand. The panel was fine but the wobble drove me nuts.

A case with enough room around the cables. The build should not require a second person to hold the side panel closed.

Fans with a noise I can tolerate. Maximum airflow numbers alone tell me very little.

A reliable power supply from a known brand with good reviews. Shouldn't be risking your thousand dollar parts just to save fifty bucks.

winters I'm one of those people who can't tolerate fan noise... so you're spot on