I would like to test the newly added v4.2/v5.0 Bluetooth features (e.g. LE Secure Connections, Data Packet Length Extension, 2xSpeed, etc) against non-nordic devices. I have a Raspberry Pi setup with the BlueZ stack, and all I need is a Bluetooth v4.2/5.0 HCI radio. Is there any specific device out there that you know of/recommend?