I came from a corsa too, the 1.6t sri version. Its nice to have a car that's much more planted and doesn't have a reputation as a chavs car! Not to mention reliability! Month out of warranty and the air conditioning compressor needed replacing to the tune of £1600, wheel bearings would need replaced regularly (i was told this is a known issue....great!), more frequently than tyres! With the z its already leaps and bounds ahead of it in terms of maintenance!
Enjoy it! I do everyday, it was the best decision!