I've been eyeing this soundbar for a few weeks now and it's at it's lowest price, you could potentially get it for $460ish when you use your gift card (5% off) and the 1.75% cashback.
It has some great reviews, one of them can be found here: https://www.avforums.com/review/samsung-hw-n650-review.14867
How great is this model compared to https://www.ozbargain.com.au/node/399778