if you are talented enough to work with THOSE materials, and have access to the machines necessary to work with them, then you really don't need our help
Im just trying to find a prefered material to use. I dont normally build stuff like this, this is sorta out of the norm for me. Just trying something different for a change. I just dont want to use materials and all of a sudden find out that it would be bad to use that material and then have to stat over with the whole project you know. That would suck.
most common material to use for custom case is wood. it's the easiest to work with with most common available tools to work with.
2nd most common material to work with would be acrylic which require less common tools to work with but still not hard to find.
3rd most common material is steel/aluminum. which requires highly specific tools and know how to work with. generally requires a metal shop with a CNC machine
4th most common material is composites such as carbon fiber and other fiber/resin based fabrication material which few knows how to work with to get the precision required for your design.
5th is exotic metal such as titanium which only very few specific shops carry the machine tools to even work with such materials.
the question of WHAT material you should make something out of is not a matter of what YOU should use, but rather what type of fabrication facilities and knowledge you have access to.. in another words, if you don't KNOW that already, none of what we say is going to matter because it's impossible for you to build it from said material anyway w/o spending $ thousands in machine shop time.
your best bet is to just go buy a TT lvl10 GT and mod it to what you want. the design you made is more for aesthetics rather then any thermal dynamic or practical reasons. it offers little to no advantage to existing offerings on the market aside from the way it looks may appear pleasing to your own taste.
so, buy a lvl10 GT and mod it to the way you want, the spend some $ on a good powder coat paint job with maybe some electroplating to spice things. up.