The prices which Sol Republic offer aren’t the discounted Australian version, we always pay more in Oz but $279.95 AUD is $216 USD.
The 50% off makes up for everything in terms of US and AU price differences. One of the founders, Kevin Lee, had worked for Beats Audio and he is the son of the founder of Monster AV which created Beats. So the similarity to Beats is not too surprising in that context. And their sound reproduction isn’t for the purist audiophile, but is designed to appeal to a particular younger market who like heavier bass and altered treble. Dr Dre was responsible for the sound profile of the original Beats headphones (IIRC). Apple owns Beats now, and Sol Republic has been created in a similar mould.
If you like the sound they are a good buy at 50% off, try them out at JB HiFi and make up your mind.
The 50% discount is still better than these prices, but not as dramatic a discount.