I'd have to agree about watching sunlight. I'd assume there will be good curtains / blinds being used there.
As far as the ledge goes, personally, I'd leave legs alone and put it up close to the ledge. Then, ontop of the ledge, maybe sneak a little shelving in that dead space, and find a few pinball/gameroom collectibles to place on shelf and enjoy.
No wasted space, no extra work, and no worry of any damage to a machine or to the tiles.