Just a suggestion - get a set of dual-adjustable (bump/rebound) shocks that also have the spring height adjustment built in. You can then change to an after market spring and be able to fine tune the height you want. Its more money, but, you have also improved the handling
An example, I lowered mine and had a problem getting into my drive, I merely adjusted the the system to get the ideal height, then, had an alignment. About the install time - two hours to remove the shocks, then the springs from the assembly and then reinstall is pretty tough to do your first time. Sapphire GTS could make a lot of money as a mechanic. You will also need a spring compressor.