Skyjacker's kit is nothing more than a glorified uber-expensive quick disconnect. All that big knob does is completely disconnect the antiswaybar, the exact same thing that far cheaper disconnects do... no more, no less.
For Currie's Antirock, which provides an incredible offroad improvement over being fully connected or completely disconnected, that's a great way to go. I would not pay extra for aluminum arms, their standard kit is fine.
Quadratec's pricing is always higher for both the product and shipping, I would instead buy them from Gerald at Savvy Offroad
where you can get them for less $$$. Tell him I sent you, he'll give you a discount.