I would speak with Alyn at AS Performance...
three weeks ago I was in the same mind as you - wanted to go whiteline, and replace all the bushes e.t.c. as my car is 12+yrs old and feeling loose.
Alyn was very helpful, and I walked away with whiteline front and rear droplinks, eibach ARB's front and rear, whiteline anti lift kit, whiteline bump/steer kit, powerflex t-bar mount bushes, powerflex gearbox mount bushes, powerflex steering rack bushes e.t.c
All VERY reasonably priced, and has transformed the car! the handling feels tight / solid, and the whole car is much more responsive.
I wanted a semi-track / fast road set up, and these parts have give me that.
Alyn won't sell you anything you don't need - I was thinking on whiteline control arms, and after discussion with Alyn, he said its not something I really needed for my use.
Hope some of that helps.
Ryan