These will be MALE DisplayPort to FEMALE HDMI.
Quality: There is no loss in quality when using this kind of adapter.
What I use
Display Port - For a 2K display at 60Hz: https://www.amazon.com/gp/product/B00K2E4T88/
Mini DisplayPort - for 2K display at 60Hz: https://www.amazon.com/gp/product/B00K0UDJFI