RMS adjustable struts - noise, harshness?

Glad to hear you like them. Where you'll notice a real difference is when you try to steer while braking. The old rubber bushed ones would allow the lower control arm to move, creating negative caster. You won't get that now.

3 or 4 degrees should be fine. My front end guy dialed in 6 degrees, which is a little overboard, but I told him I wanted stablity at the dragstrip. The shop I went to does quite a bit of sprint cars and stuff like that, so the aftermarket parts didn't throw them at all.