Soft-ish suspension options?

So I have a 2011 Speed3 that the previous owner lowered on a set of koni yellows and some unknown springs, and they've blown out. Not only that, but even before then they were too stiff for my liking. It's my daily, and I live in New England where the roads suck. The picture shows one of the lovely roads I have to drive on every day. I'm tired of being thrown around on roads like this. Since OEM parts tend to be hard to find, I'm thinking of getting Billstein b6's and some eibach pro kit or Swift spec-R springs. Does anyone have experience with that setup on roads like this, or have any other recommendations?

So I have a 2011 Speed3 that the previous owner lowered on a set of koni yellows and some unknown springs, and they've blown out. Not only that, but even before then they were too stiff for my liking. It's my daily, and I live in New England where the roads suck. The picture shows one of the lovely roads I have to drive on every day. I'm tired of being thrown around on roads like this. Since OEM parts tend to be hard to find, I'm thinking of getting Billstein b6's and some eibach pro kit or Swift spec-R springs. Does anyone have experience with that setup on roads like this, or have any other recommendations?