Aftermarket and factory support is greater for Toyota, the most you're going to do to a 5yr old rig is lockers, armor and 33s. It's just cheaper and easier in a 4runner. The biggest drawback for the Pathy is the big plastic shit hanging off the bumpers and the lack of a factory locker. IRS is awesome for clearance but it's weaknesses start to show above 33s as articulation and strength suffers.
Is ARB the only locker option? We also need more rear bumper options as its not a part we share with the Frontier.