For a daily driver coilovers are over kill imo.
+1
coilovers will feel firmer/rougher on aussie roads, but in terms of real handling sway bars with sports springs will give you much better bang for your buck. a car with coilovers will still have body roll, and body roll is the enemy in cornering.
coilovers without other suspension components are a waste.
option a) good quality springs, sway bars, and bushes about $1000 installed.
option b) coilovers, OVER $2000 installed.
I'd take option a) every time and spend that $1000 (at least) you save on other go fast bits, because option b) with just coilovers will perform worse anyway and cost you more.
Unless I was building a track car and wasnt concerned about ride quality at all- in which case b) and then spend extra gettng the tuned suspension bits that actually allow you to use the coilovers exactly how they were intended to be used.
Mind you nothing like a full coilover setup in a COMPLETE suspension setup tuned to work together. Its like the car is on rails when cornering.