A huge bench is of less use to most reloaders than a LOT of storage. You should have enough storage for all components, small tools, tumbler, media, chronograph & tripod, targets, staplers, waste can, gun cleaning supplies/rods, bullet molds, lead, lubrisizer, bore sighters, a small vacuum & broom, etc. Consider covering the walls with shelving, floor to ceiling.
Then make your bench an 'island', maybe 2 1/2' x 6', and mount presses, etc, on both sides. And make more storage shelves under the top.