If you're comfortable and have cash, a type-r conversion would be a nice project. Otherwise, just sell the 1.8 and get a 1.5T like most people have suggested here
The 1.5 Turbo comes with more HP from factory over the 1.8, and you can get some nice HP gains as well with some supporting mods and a tune.
In your case, switching the 1.8 out for a 1.5T makes the most sense, if it still feels lacking you have the path of a few mods and a tune.