I agree with Alan.
Coil overs are not cheap, but the difference in ride quality and control is significant.
A spring and shock combo will run around 900-$1,000. Coilovers start at around $1,000 and up. KW V3s are $2,200-2,600.
Like the man said you get what you pay for. Labor is same cost either way.
I am very happy with my H&R Sports with Koni FSD. But for an extra $1,000 I could have had KW V2 or Bilstein PSS 10 coilovers. There is no doubt that they represent another step up.
Audio: Jehnert Flatline speakers, Mobridge M1000 DA2 prepro, Helix P-DSP, Zapco Z-150.6 amp, CIC iDrive upgrade
Performance: Cobb Pro Tune, AR Downpipes, ER FMIC/CP, DCI, RB turbos and inlets, KW V2 coilovers, Fuel-It Stage 2 pump w Ported fuel rail, Mfactory LSD