I've have been reading a lot about this myself mostly in the FJ forum. Pro's with solid axle more articulation, IFS a little more. Cons
On road driving danger in an already high center of grav vehicle, IFS increase in droop with increase risk of pulling a half shaft unless you use limit straps.
And the only good ones for my truck are from Australia and they are sliding links, still waiting on a return E-mail on price with shipping. They are good for most IFS Toyota.
Yea, it's a case by case basis. My Xterra has excellent road manners, for a lifted SUV, without sway bars. And I know better than to drive it like a car. They've been off for years. Plus I have droop stops that keep me from pulling a half shaft out. I was just scheming with @SLO Robert about fabbing up some disco's for him.
I drive an 80, no need to disconnect.. I DID drive my share of jeeps and there is definitely a need to disconnect while off pavement. . After the trail, when you're back on pavement, reconnect. Some guys don't reconnect and think everything is fine, they think they can adjust their driving habits accordingly, untill some one pulls out right smack in front of you while doing 55 and in order to keep from T-boning them you make a very quick left, then right to get back in your lane. With the sway bar disconnected? Forget it, you're gonna roll..