You can never be to low.
But let me help you a little bit here..
Some people will say just skip springs and go straight to coilovers. Now we all can not afford coilovers so a lot of people will also give you their setup. Alot of people just just run a spring and shock set up. People have their preferences. I am running Eibach Sportlines on stock struts. Alot will say you will blow them out that way. I personally have not blown them out at all and I am happy with my drop at the moment. But I am making the purchase of coilovers in the near future for multiple purposes. Best bet is to do a little research on each and every spring drop as well as coilover if you have the money for them..
Or if you want we have GI thread hoping that Raceland can make some coils for our cars at a good price so go check that out as well. http://www.newtiburon.com/forums/sho...d.php?t=198962
So check that out and hope you find everything you are looking for and good luck and happy modding.