Cost to build a Mining Rig - RX 5600 XT - April 2021

This is part of a monthly series I do, but I welcome any input on what you would build for around $4000. Is the RX 5600 XT still attractive or would you go with the RX 6600 XT or RX 6700 XT? Feel free to share, comment, or provide your insight below. Please and Thank you in advance.