Well I want to kill two bird with one stone.. my suspension is hella tight and I want to make it a softer ride for luxury purposes, but with 2 50 pound subs in the back and upgrading to a beefier enclosure plus a 32 AGM I think it's taking a toll on my suspension. It's squeaks a lot now when I'm turning or going over bumps fast or slow. Is there a way I can get springs that handle more weight yet are smoother ? For a 2006 Buick LaCrosse. I dont know what the different purposes are for struts and springs