rebuild

I'm planing to rebuild my SFF system that I've done twice now. (I do this every few years) I again want to reuse some components from the current setup. I'm looking for thoughts/opinions on component compatibility and updates. Things have moved on since my build tears ago, so I'm not sure how...

I have an Areca 1880 with 12 drives. I believe I'm having power issues as occasionally I'll have drives "fail" randomly. There appears to be nothing wrong with the drive based on the SMART data. My guess is a faulty power connector. My question is, every time a drive "fails", it comes back...