Motorization in 156???

Hiho, thanks to the quick help because of the insurance questions, I have taken the Alfa 156 resp. 156 sportswagon into the short choice! Which motorization should you choose?? The very highest thing, which will be maintenance in the beginning, is the 2.0 liter machine!! As said, the highest!!! possibly enough already the 1.6er?? Or should you rather grab the 1.8er?? The GTA and diesel fall out anyway!! Diesel is too expensive and I can’t keep a GTA at all!!! Maybe sometime!!!