Best next suspension upgrade?

You need to figure out what's wrong before you start throwing parts at it. If the LCA's moved on the pins, either something is wrong with the LCA bushing installation, or the strut rods are in fact too long. Have you had the alignment checked recently? Did you check the LCA pivot pin mounts in the K frame when you installed the new bushings in the LCA's?

If something is wrong there, your next purchase should either be delrin LCA bushings, adjustable strut rods, welding up the LCA pivot mounts, or maybe even all of the above. But only after determining which one is the culprit.

As for the rest of your wish list, I'll say this. You can't get the right length shocks until you lower the car. The shocks that will fit your car right now might not fit when you lower it, because it appears your car is sitting fairly high. And if you're lowering for a pro-touring style car, (ie, low)you will probably need shorter shocks than standard. So, don't buy fancy expensive shocks until you lower the car. Which in your case means you should look for rims with the right specs first.

Sway bars are easy. They will fit the car now, they will fit the car later. Some end link adjustment will probably be necessary when you lower the car, but otherwise not much changes. So, you can add sway bars anytime. But I would recommend finding and fixing your front end issues first, because I assume you're not on an unlimited budget.