More "real world" grip and improved handling precision. (This thing won't ever handle like my old MY03 WRX but that is my benchmark)
I am 52 so forget lows and coilovers for me.
Probably Billstein S4 sports and maybe another 10-15mm lower on the springs. (The front valance already scrapes standard curbs).
Before I can do them justice I was thinking about bushes. Rear beam, front wishbones (with ball joints) and ARB bushes. (No point doing the strut tops if I am going to do the Billsteins next month).
Anything else? Or other suggestions for sharpening the handling of a 135k mile car are more than welcome.