Question about strut problem/replacement

[RenaissanceMan]

Hey folks-

In the last couple of days I have noticed the ride quality suddenly drastically worsen on my 3.0. Specifically, the left front wheel when going over bumps jars the car violently, as if there is no damper compliance, whatsoever. Also, when cruising on the highway, if the left front hits a large bump you can feel a bouncing judder for about a second. I took a look at it without taking anything apart yet and I noticed there is some oil that has collected and is dripping off of the left front coil spring. I'm assuming it's from a blown strut?

I'm also assuming since I have coil springs that I don't have air struts up front... Is that a safe assumption? Sorry if that's a stupid question; I just want to be sure. Also when I bought the truck I was told it had the sport suspension but how can I be sure? It looks like there are different spec struts for sport suspension X5's... I want to make sure I purchase the correct parts. Thx-