I have a set up of 4 E-series lights 2 - 6" Spots in the center and 2 6" Floods on the sides. In the back I have 2 Duallys. For the E-series needed the Rigid U-brackets. Had them wiredhot with 3 switches, 1 for spots, 1 for floods, 1 for rear. Had Hi-Tech Auto & Truck in Chantilly, VA wire them up for me - they did an awesome job.
Performance is unparalleled. I can put the sun to shame. At night the moon reflects MY light.
The rear lights are what I use most often - my only issue with them is how far away they cast the light from the rear of the truck partly due to the rear fairing thing on the 4Runner. I have been contemplating putting the lights on gooseneck mounts so I can control the light better when I'm working behind the truck or camping - added functionality.
My only qualms are that I really like the look of the round off-road lights and the added protection of a metal grill/cover. My wife says I put a tiara on my car because its so "sparkly." :nono: