wonder if OP has made a decision yet on either option.

for everyone it'll come down to money

those with the cash obviously have more options with what suspension set up they go for

what i dont understand with this thread is that you are comparing 'entry level' springs and coils where the actual difference in price is around $800..

if you had the cash just get the coils and be done with it..
if you dont want to spend as much on the car and put it somewhere else get the springs..

OP already said he will be daily driving the car and no track use whatsoever - so get springs and spend the rest of the difference on the exhaust or CAI

In regards to the question about height, Senna might have to confirm but lows will go around an inch plus once settled will go slightly lower again which sounds like what you are after

loweirng the car will add wear to your shocks so over time just put some cash away for that
once they let go you will have plenty of cash to replace them