The bead locks keep the wheel from spinning in the tire ( hence the word bead lock). The Kores ( like most other wheels on the market) rely on the air pressure to create the friction needed to keep the wheel from spinning in the tire. If you used your machine as a rock crawler, I would say get the bead locks. But if not it is your personal choice on which style you choose.
Basically the 4+3 will stick out 1" more than the 5+2.
The 4+3 has 4" to the inside and 3" to the outside.
The 5+2 has 5" to the inside and 2" to the outside.
The recommended wheel width for the 11" tire is 71/2 to 81/2. Even though this will work on a 7" wide wheel, putting it on a 7" inch wide wheel will make the tire slightly taller and wider (the sidewall will stick out past the wheel a little more), ( of course this will also depend on the air pressure you run in the tires).
Wheel Offset Explained - Stop guessing and wondering