Hell yeah coilovers rock!
Spend your money how you wish because that's the way it's supposed, and to be you're never wrong if you've done some homework, asked your questions to qualified professionals. In the end, it's your choice.
To me coilovers are a great addition to fine tuning your daily go fast ride. If you have the small cash reserve buy a quality system, trust me, you will love them.
Just had Cobb Tuning install a set of AST 4100's on my 2011 DMG Cobb Tuned Stage II GR and I love them. Set the front at 4 and the rear at 6 this car stays down at high speeds. Nothing harsh about the ride. Only confidence inspiring driving felt right through the steerring wheel, very connected feel. What a performance ride feel like. I went from a set of the Eibach Pro lowering springs to the AST coils and couldn't be happier. Find somone whose got them and see for yourself.