125# or 150# rear c/o springs?

Thank you. Jegs has a 10% sale and the coilovers with springs is $425. My buddy says to try the 150# springs but I'm leaning more towards the 125's. Summit has their 125# for 34.99 each. I know it's not much but every little bit helps. What brand are the one's you have - are they powder coated - how much plus shipping? Doug <><
BTW - are the springs marked to determine what rate they are?