Hey hey, another bass head looking to build a system

Hey everyone, I'm Pat. I'm a long time DJ and event producer based in Melbourne, Australia. I've always had dreams of having my own sound system to do some parties with, and I'm finally in a position to do so, so I'm here to read a million threads and get a million plans for bottom heavy subs 😛

Most likely looking at either 4x18" Keystones or 2x21" Othorns for subs, and I'd love to try some of the Synergy clone horn tops (SynTrip's look unreal), but if anyone has other suggestions for a slightly less complicated mid/top box then I'm all ears!