Only problem I had was when I drove up here to alaska from Ontario with my car loaded. I was sitting pretty low but only hit when going (very slowly I might add) over speed bumps I came across. Other then that, no problems. Have had 4 adults in the car, no incidents. Of course the car did not sit as low with them as it did loaded up for my move.
2007 stage 2 Satin White Pearl Subaru STi 2008 stage 2 Subaru STi hatch See my car at: Mavrik's car page
Sportlines for $100 is a great deal from what I remember when shopping for springs a couple years ago. There were two types of Eibachs and one was lower than the other. If it's the lower one, it's just a tad higher than the S-techs. I'd take them over the S-techs, although I am very happy with the S-techs. I once had 6 adults in my car with the S-techs and it didn't rub, but it sure was low.
Justin 2003 Vibe GT - Mille Miglia Evo5 18x8 Wheels (now stock)- Magnaflow Cat-Back Exhaust (now stock)- Tein S-Tech Springs (now stock)- Injen CAI - Red Painted Calipers - Hella Supertone Horns - Polk Speakers - Bazooka RS8A-HP Sub - Kenwood Headunit - Still love my Vibe, but I've just turned it back into a basic daily driver.
I had 18" on my car and with the S-techs I had rubbing problems in the front while driving. I went to 17" and have not had any problems. If you do go with 18" make sure you get the right saries tires.