Red Headed Stepchild-75 Swinger LSX Swap

Anyone have any suggestions on which company to go with for the new rear shackles? I've seen a few stock style ones but I'm replacing everything with newer and stronger so id like to try and go that route.

I've seen sets like this.
http://www.calvertracing.com/store/shackle-bushing-setabody-mopar-p-170.html

Is there any benefit of running these seeing as the Hotchkis Leaf's came with their own bushing for the shackles?
http://www.ebay.com/itm/Rear-Leaf-S...ash=item2335bf22fd:g:vfcAAOxyOlhS8XbE&vxp=mtr

I know I plan on running a little wider tire in the rear and may end up doing a spring relocation to give me a little more room in the back for a wider tire. I figure if im going to spend the money I may as well only do it once. The relocation kit comes with new shackles already. Just trying to decide if its worth it or just keep it how it is and do a minitub later.