I can't believe you really weld.
IMO, the rails should stick out about as far as the outside of your tires, but farther than the stock rails. 3 inches looks about right. Taper the corners and have them come back toward the rear tire a little farther. (like 4 or 5 inches) I would use a little thicker tubing for more strength.
Remember that your pant leg will rub the dirt off everytime you get in and out of the door, too.
I'm not going for new rails, I'm just going to buy a paint gun.
