Well, OEM is always the best way to go. But you're gonna pay for it. Probably about $500+ per front air spring/shock unit and I'm not sure about the rear springs. I can't afford that, so I got mine from Arnott. They were $186 each and I installed them myself in about an hour. A stealership will probably charge you at least 4 hours labor when it's a seriously easy pie job. Even if you have zero experience changing them out, I'd bet it wouldn't take you much more than a couple of hours at most. It's that easy. The only problem with the Arnott front air spring/shocks is that they only have a 12 month warranty. I bought a set about 6 years ago that only lasted 14 months. The set I have on my car now I bought in Jan. 2009 and they're still fine, knock on wood. But you just have to decide what's within your budget.