Progress springs came on my car from the dealership. I've had it for about two months and there aren't any creaks, rattles, or other things that would make me choose the Sportlines over the Progresses. Also, the drop looks great; I've only scraped the front lip once and that was because I was dumb and didn't see that the parking lot that I was in emptied onto the road at a 30 degree angle. The ride is not too bad over factory either.
My reccomendation: Go for the Progresses.
VBP
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