One thing to think of....if you are doing welding and torch cutting....epoxy floors will not stand up to the heat of hot slag. It will burn holes right through it. We had to convert an epoxy coated floor area at work to a "hot work" area, and the epoxy floors are looking really bad in a short time. The sealed concrete is a good idea...and they also offer stains to color the concrete that look pretty nice. Staining/sealing doesn't do too much good if you already have the complimentary oil stains....they won't cover that whereas epoxy will cover that after thorough cleaning and etching.