i dont know much about EIbach springs but i have KYB AGX's (with H&R sports) and i love em.
the adjustability is key, id go nuts if they were stiff all the time and if i couldnt stiffen them up for a hard drive, it wouldnt be worth it to lower my car.

for daily driving, im using 1F and 2R for hard drives, i just go with 4 all around.