Alright, I've just started my search for a coilover kit and I realize there are several reputable companies out there. I've been looking mainly at the H&R options, but I know a few people who have the Eibach kit and like it. I also came across AW's S4 project car and they said they used a Vortag (now known as Stassis Engineering) kit. Has anyone ever had any experience with Vortag stuff?

As a side note, I'm also curious what setups people have and why they like/dislike 'em.

I run with FK Silverline Plus.

The H&R CO's are probably the most popular. Stasis is top-of-the-line. Neuspeed makes a system, too. Eibach had issues with sagging springs - this may have been resolved by now, but I don't know.

H&R has issues with their coiloers going bad. They say they back them up with a warranty, but getting that fulfilled is a whole different story. They make good springs, but i would match those with koni struts or bilstein or something like that.

I prefer Stasis over anything else, but FK makes great stuff too. Not so sure about Neuspeed, but last time i checked they were geared more towards Honda than hi-tech audi's.

Not true. They have a great following of VW and Audi parts and accessories. Most of which are very good products with positive feedback from Audi owners.

Their springs and shocks are mostly Koni and Bilstein setups, but they do have proprietary springs, too.

Here: Neuspeed S4 Suspension products

How do you like your FK's? I had a link to a place that sold FK stuff, but i can't find it anymore.

Well, good news, I made enough money to pay for the Stasis suspension kit, but now it's a matter of time and whether I wanna get that crazy on coilovers!

I like them. They took a while to get used to and to get them dialed in properly, but they are great.
It took a while for me to get used to driving with progressive springs.... They are soft on hard corners over rough terrain, but that's more of a blessing for me. The cornering overall is better and the ride feels much like stock when I'm daily driving.