While I have a larger job I use my belt sander, maximum of the rest of the time I use my random orbital sander. I very rarely use my quarter-sheet sander, but there are times when it fits better on a job.
I am using Tacklife SDP50DC screwdriver. It's a really fantastic set and easy to use. So, you can try it. But my suggestion, you use Stalwart Pivoting Screwdriver. It has a 3.6 Volt Lithium battery.