Are aftermarket A body upper control arms worth it ?

At seems that the Biggest advantage for aftermarket ones is more caster, thus making the cars able to accepted Modern tires. I already have the offset Moog Upper control arm bushings. Gas Bilsteins, 1 1/4 inch sway bar, rear stabilizer bar on the rear, new manual steering box, Ss Springs., rear disc brakes. Im thinking that my money would be better spent elsewhere, like really Good tires ?
What do you think ?

Arm