Eibach don't the Pro springs for the GTI. Only non-GTIs @ -30mm, which will drop a GTI ~ 10-15mm.
If you want GTI specific, Sportsline is the only spring they offer.
I was not even aware, thanks for the heads-up. Suspension is such a subjective thing, especially depending on the roads you live.
No worries. Pro is softer than Sportsline, so probably why they don't offer it for the GTI as it would be barely any stiffer than standard.
If you don't have great roads, then my suggestion would be Eibach Pro Non-GTI / H&R non-GTI, with MK5 GTI spec B4s, or MK6 spec GTI B6 if you can stretch to them.
That will give you a 10-15mm drop, which is way more forgiving that most specific sports kits/coilovers, but not too soft like the Racingline setup. It feels like a good compromise to me. For pants roads, you need suspension travel and soft springs/damping. Slammage just gives you back and teeth breakage, and a car that just looks ridiculous and embarrassing bouncing around over the tiniest of bumps most other cars don't even notice.