Looking good so far. I was seriously contemplating that CPU block, but went with the mono block instead.
Some things about the distroplate that maybe useful for you though.
When filling the system the first time, the pump will make weird clunking sounds on that distro plate. I was dreading a faulty pump. Its normal though and will go away once its fully lubricated.
Make sure the pump PWN head is not plugged in to start with so it will run 100% which will help it bleed a lot faster. If its plugged into a header it will barely move.
At full speed with my setup up (4900 RPM) the flow rate is 1 gallon per minute. To make it barely audible it needs to run around 3500 rpm which is 0.60 gallon per minute which is a good flow rate.
Its a pain to drain, so make sure you choose the right coolant first go.
The RGB cable on the distroplate is not long enough to neatly get to the motherboard, so make sure you either have an extension or splitter if you have multiple A-RGB devices.
Good luck on your build.