I had the same thought when I bought my new 2013 because I have a Thule car box that I love using for roadtrips, but most aftermarket crossbars where blocky / ugly.
To get nice streamlined crossbars that cut through the air you’ll need to go with a good brand like Thule or Yakima. Then you’ll need a universal connector for the QX60 rails (may already come with Yakima/Thule). At the end you may be close to OEM prices.
Let us know if you find a great deal on streamlined cross bars. I have an order in for a QX60 2023 and OEM crossbars is (currently) on my list.