There's some other variables to consider. So when I bought my car about four years ago, I just went with the H&R lowering springs. They gave me the drop I wanted and served me well. I recently bought new rims and now find myself wanting to kill wheel gap since I went with lower profile tires. I will likely transition to coilovers, either Tein or AMR. The H&R springs served me well though.I'm still on the fence about just lowering springs vs coilovers, I want to drop the car a little bit (no more than an inch) and I would like it to feel stiffer but not so much that it kills my butt... A lot of coilovers I see seem to have a minimum drop of ~1.5 inches which is too much for me - are there decent coilovers out there that are fully adjustable, and allow for a smaller minimum drop that will work with the sedan?
On the other hand, paying that much for "just" a ~1 inch drop is... not very smart, but I'm still considering it.
I think the Eibach Kit or H&R will fit what you're looking for, but if you want to make changes down the line, coils will give you more versatility and options.