I'm running OME coils and shocks and can tell you that it is much stiffer than stock. I have a friend about a block away with the stock suspension and I feel like I'm in a cadillac riding in his 4Runner after being in mine.

Now with that being said, I don't mind the ride at all in mine. I actually kind of like it. It never bounces over dips and I feel very connected to the road. It turn's flater and handles better too.

I deal with Dallas roads though which are generally pretty smooth, so I could imagine that it would be a different story if I had to drive on some pretty rough pavement.

I don't have any experience with the bilstein / TRD setup but would imagine that it would be stiffer that the stock as well.

Hope this helps.