Yeah I looked at those chassis but that power supply is 3in tall and wanted something vented on top. Will build a12x10 box with oak 1x4 sides, metal inlay panel for connections on back, and open mesh vented top for good heat dissipation. Bottom will be heavy steel for structural stability and good heat sink. Luckily I have some thermal paste around from building pcs so it should work out nicely.
Also Brandon, depending on what type of stuff you're wanting to build, there are many good resources and kits to start out with. Tubes4hifi, Elekit, Bottlehead and Akitika all make some pretty easy builds with tolerable but thorough instructions. Built and tinkered with a few Tubes4HiFi kits and have another EL84 amp going to complete this winter. All of these brands have good resources from the company with lots of help here and on the diyaudio forum. Welcome to the dark side!