Yes Australia and NZ are one of the best destinations in Dec-Jan-Feb as they are in the southern hemisphere and have summers at that time.
Although a package to NZ is generally very expensive - in the range of 2.25-3 LAkh per person.
There are many, depending on the time and budget. South Asian destinations like Bali, Cambodia or if time is not a constraint may be South America , Peru and Chile .
Yes ,NZ tourist season starts from Nov- dec- Jan-Feb. Weather with be very pleasant and cool .Days will be Longer .Best time to go during this season plus Christmas month in DEC.. you will enjoy the trip. and try to book hot air balloon ride well in advance .
Yes! December to May is usually the best time to visit New Zealand. In case you don't mind delaying your trip by a month, check this package out for 30th January!