You're a craftsman. Some of those are elaborate....and beautiful.
Here's my criteria, I'll leave the design up to you.
Need 2 levels.
Will be primarily running a 120.2 rad water setup.
I'll adapt my chiller to the final product.
Will also use for air and sub ambient colder than my chiller on occasion.
Keep in mind that I change platforms all the time. Everything from slots to current tech.
Pretty basic after looking at some of your others.

Something like this would be just fine.
Surprise me.