Short Honeymoon-where to go/stay??

Hi,

My husband and I are planning our honeymoon for either Sept or October (hopefully dates to be saved soon) we are primarily going to be visiting New Zealand with a stop in Sydney, Australia.

We were going to go to Cannes but are interested in visiting Fiji on the way to NZ. It will likely not be a long stopover..3-4 days. I do not have a flight itinerary yet.

We want something affordable but are willing to pay upwards of 200USD per night. We want somewhere that is romantic not really a "party" vibe that has activities such as a spa and somewhere to scuba.

I am looking for what area to go to that I can easily get to from Nadi, that has some good scuba diving (we are beginners so nothing too advanced) that is quiet but nothing that breaks the bank!

Just starting to research fiji so any recommendations, hints or tips would be appreciated!

Thank You!

Nanuya Island Resort.
No spa, but ticks all the other boxes.
http://www.nanuyafiji.com/
Book early as it is relatively small, good value and often booked out.

Cheers,
Peter

Thank you.

Sorry, meant to write Cairns in my post.