leakwoon, those are called height adjustable coilovers. They handle better but tend to be much stiffer. My friend yolk was using Titan for his previous car (toyota). Maybe you can pm him to ask him what he thinks of it. BMWsideways is also using Titan. I'm using RG height adjustable coilovers, handling it's also much better than lowering springs but it's also stiffer.
Daniel, whats the distance from the centre of your rim to the fender for your front and your rear?
If you check the settings for lowering springs, it is normal to be lower at the front. Most of them are 30-40/15-20 (ie. 30-40mm lower for front & 15-20mm lower for rear).
When the car is at stock settings, the front has more gap than the rear.