What hubs are you running? Reason I ask is the pre 05 WRX hubs are prone to destroying wheel bearings. Post 05 went 30% larger and handle track heat significantly better without "pad knock off". If you have the smaller bearings a lower thermal transfer into the wheel bearing is extremely desirable.

Moving from standard to DBA 5000 two piece I noticed a good gain in acceleration response, braking and handling. This was with ultra light light 16x8 SSR Type C rims that were 5.48 kg each+R Spec tyres on a race track... Implying that some may not notice any gains due to already having overweight rims, poor rubber or simply obeying the road rules. Unsprung weight reduction is all win.

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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you!