I like the top, the mix of caps and labels breaks it up nice.
I'm a big fan of using the copper pipe in the tower for cooling but it looks like it may be tough to change out the lines with the angle of the copper. Hopefully you didn't solder those connections.
The only thing I would suggest is to add more insulation in the tower. Instead of using more expanding foam you could use styrofoam packing beads, the stuff they use for bean bag fill.