We have a ring sling and a Manduca. I have found both brilliant and highly recommend the Manduca to everyone though it is a bit pricey.
Slingbabies is a group dedicated to helping mums find the right carrier for them. There is a baby wearing group in Hamilton and I have copied this off their website for you:
~*~Waikato Baby Carriers~*~
Meets on the THIRD THURSDAY of the month 9.30am – 11.30 am (except school holidays)
at Parent’s Place, 87 Boundary Rd, Hamilton.
waikatobabycarriers at g mail dot com for any queries.
All the best with the rest of your pregnancy!