I am running the Dobinson's rear long travel 701v springs and shocks. Just ditched my sway bar and added extended brake lines.
The flex is every bit worth it. Makes a big difference. I've been able to run obstacles where I used to need a locker and the extra flex keeps the tires planted.
If you have an SR5 with no locker I would highly suggest this route.
The downside is needing to extend your rear bump stops. Even with the 701v, fully loaded for my trip out west, I would hit the bump stops offroad easily. Unloaded on a trail it's perfect! But expect to have a 3" rear lift, which I like a nice rake.
This photo still had the rear sway bar attached with the Dobinson's adjustable end links to allow for more down travel. Without the rear sway bar its even better.
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2017 4Runner TRD OR - Progress Thread
295/70/17 BFG KM3, SCS F5 17x9 -38, Front 5100 Rear MT Icon, Dobinson 314 & 701V, Gobi Stealth, RSG Sliders, ECGS 4.56's, Demello Front bumper, Coastal Off Road Rear Bumper
IG: dot_tom