What's a good starter suspension system that can be upgraded later?

only thing to add after welding the k member is go full poly bushing kit. the t bars can be swapped easily, the shocks can swap, sway bars can be added.

full front rebuild kit with idler and pit
reinforce k and control arms.

and other posts, anyone make a bushed adjustable strut rod yet? I would love to see a poly bushed strut rod to let the control arm move thru its motion easier...