Hard to say really, going lower may just put you into a region of bump steer which will affect the tracking, depends on how low it actually is. For peace of mind, its worth checking the whole setup and getting the people who do it to even out the cambers to around 1.5deg negative on both sides. This may increase wear on the tyres a touch but it wont kill the tyres and will increase cornering grip. Personally I pull on as much camber as i can get out of the slots on the struts and then even it out using my own gauge, I normally see somewhere around 1.5-2deg negative and the wear on the tyres is fine as far as Im concerned (I say normally as Im on my fourth front end setup since I bought the car and the various damper slots and ride heights have had different effects :S).
