We can sort you out with membership on the day mate if nesc, Spence keeps a set of cards on him.
If you mean my coilovers, ie KWs, then I'm very pleased with them. Bit firm for road use but deffo gained me some time on the track. Had a play with the settings at Barkston at the end of the year and got the car where I wanted it (and a 51 sec lap on my old RE070s).
Not sure I want you to be on them tbh, you will deffo be faster!
Not fitted the coilovers and will be a few weeks yet...
I went for them because they're similar to but better than my old D2's, which worked well on my old WRX. KW's should have better quality damping, plus separate bump/rebound adjustment, but as you say they're twice the price. Apex are working really hard on these initial deals, basically to get a foot into the Impreza market.
Not sure if their next batch will be same price. May be worth seeing if they're doing any trackdays soon and getting a demo. They are genuine trackday/sprint enthusiasts and keen to demonstrate how their kit works on the track.
IIRC Andy has 6/5 kg/mm springs on his KWs, same as Apex have on their STi5 demo car. I have 5/4, same as I had on the old D2s after initially trying 6/4 which I found harsh on the road. Suspect these are all harder than your Whiteline springs but I may be wrong.