My two cents.
I don't miss my Fein detail sander at all. I think it caused me more work than it saved. But that being said I'm in the pneumatic sander camp. Lighter weight, don't heat up, way more control, last forever and do a much better job. Fein makes a pneumatic version of their sander which will allow you to instantly control the speed of the action, that's really important to me on a sander. I'm sure you could run it off a 20 gal compressor. Summer humidity can mess up pneumatics which is a drawback. In my shop I run a refrigerated air dryer. But if you keep your sanders well oiled they should be alright.
Ben