What coilovers have you got? What are the spring rates on them?
Deffo worth checking all the basics first: top mounts, steering rack play, steering column pinch bolt, steering rack pinch bolt, rear axle bushes, wheel bearings all round, tyre pressures, track rod ends and lower ball joints. I'd also remove the rear spacers for definite.
Also worth checking that the front bumper iron and lower radiator support bar are properly bolted up to the chassis legs, there's a surprising number of cars now where these are loose and it means the front end can flex all over the place.
Out of interest, did you get geometry figures from the tracking place? They're useful to check that the rear axle is straight.