Neat video for the forthcoming Beretta ARX-100:
I have a vague wantsies for it, in the same way and for the same reasons as the SCAR, but it suffers from the same problem faced by Everything Not An AR: Price.
Don't be fooled: If the AR-15 were released today, it'd probably hit the market at close to two grand as well, but the development costs are long amortized and builders can buy parts from a host of outside vendors and that's why you can get an AR for so much cheaper than the newer guns.
As someone who owned a Beretta AR-70 during the Ban Years, I appreciate the fact that the new ARX takes STANAG mags. We joke now about magazines for this gun or that gun being made of "unobtainium", but that's almost the God's honest truth about Beretta AR-70 mags ten years ago.
I searched and searched and found one guy on the internet who had some 30-rounders he would let go for $160 apiece, with the caveat that you had to buy the rifle he was selling, too; he wouldn't sell any mags separately.