After the last thread on this subject, I got to thinking about what I use each for. Have to have my belt sanders - got 2. One unit has a 10" disc and the other has an oscillating spindle. Need both. For shaping odd pieces, I really need the disc and for interior rounded objects, I need the spindle. There is no good answer for someone else as to what is "best". It all depends on what you make the most. A variety of hand sanders is also a must. I keep a random orbital but use it the least. I have 3 different 1/4 sheet sanders that I use the most. ( More control, least expensive sandpaper). I keep different grits on each so I don't have to change the paper every time I need to move on.