Hello Thepenguin!
The computer looks solid. 2 things I would like to point out though.
Firstly, the AMD cards are quite powerhungry, 500 watts will be well enough but if you plan on maby an OC on both CPU and GPU or maby a CFx in the future. it could be a good idea to "futureproof" yourself with a 750 watt PSU.
Second, when building a new computer today i always suggest installing your OS and maby your favourite games on a SSD. They're quite cheap today and it's extremely worth it.
Good luck on building and have a great time with your new computer!