Are you WRX or STi?
If WRX - then the VF35 (good for 330 ish) from the STi would be a nice upgrade.
If you want to spend big money, (£1300+) then SC32 (320 ish) / SC38 (380 ish) / SC42 (420 ish)
Or Laterals MD321T (upto 450 ish) is where I will be heading when funds allow
