k04 or k05?

I am looking to get a turbo upgade and im not sure wether i want to go with the k04 or k05 turbo kit. if anyone has upgraded there turbo on a 1.8t please let me know what you did and how it turned out

Ko5? Well not sure about that one but Im k04ed right now and was worth every penny over a k03s. Make sure your chipped because the stock ecu cant compensate enough for the k04. Ive been down that road...