Calmini shackles are fine, as long as you are ok with the blue paint wearing off. They are no problem getting, or installing.
Shrock sliders are a good choice, and seem to be the preferred brand currently.
As for mods, I will probably need to replace/upgrade my centerlink soon, and probably replace the power steering gear box. Unfortunately, it is not worth a trip down to Ocean City for a mod day. Maybe down to TJ's.
k_enn