That looks very nice. That will last you for quite some time. I'm in the process of finishing up my Taig enclosure as well. Being my first enclosure and not sure what I want ultimately I went cheap. I used 5/8" MDF painted with a rubberized paint. Works very well. Cost me about $25 for the base ($10 for the MDF and $15 for the paint). I cut the parts on the table saw and routed all of the edges for a cleaner look. I spent about $220 on my coolant system with the drain pipes, etc. For the sides I'm using 7/16" heavy duty window screens with 3 mil plastic in place of window screen. Thus far it's working very well, and again it's cheap. Boat window grade clear vinyl would laso work. Once I get something I'm happy with, I'll bend a new sheet metal tray along with acrylic or lexan side panels.
I'm working on my servo system this week and hopefully I'll have the Taig up and running shortly. Mine has some spindle motor problems though so I'm waiting on a replacement motor from Taig.
I went with the $100 10 gallon Enco cooler. Works VERY nicely btw. If you have any questions about the cooling system, let me know. Again, nice job!
Pics:
http://www.dmwtech.com/gallery2/v/machining/wt/
Pics2:
http://www.dmwtech.com/gallery2/v/machining/taig/