My father has a Zs 180 and he loves it. Owned a 2010 Impreza Wrx as well and seems to rather the N/A Mg with a V6! I've driven both as well and would rather the Mg for the torque. But driving the Zed is a different beast altogether - torque, power and even some side ways action if driven in a 'spirited' manner. With a V6, 300bhp and RWD, the Zed really is a fun car to own!
Good luck with your search! Read the advice and take your time!