A good matched spring and shock set is as good as anything.
Coilovers give you adjustability of ride height. Generally though
coilovers are set and left at that height so if a shock and spring combo gives you the height you desire then i would just opt for that, would be more comfortable.
45/50mm is quite a drop.
AP is at your
lower end for
coilovers (made by KW)
Weitec is mid range (again made by KW)
Then you have KW, i have had 2 sets of KW’s before and they are very good but again very pricey.