I have 6 stationary belt sanders in my shop and always looking for more. Some are big and some small, but each have a specific chore that i use them for.
My biggest is a 8 x 144 5hp crouch. WOW! I would shoot someone if they tried to take that from me. It is fantastic for profiling limbs among other things.
It replaced a 6 x 108 delta as the work horse, but I found another job for it so I kept it too. Infact, every belt sander I have sold I regret selling.
Remember this, the longer the belt, the cooler it will stay as you sand. It is important that you have enough horse to handle it though.
Bigjim