Hydrophyte ~ your grow-out display is a very nice idea, with an interesting assortment of plants! I like the terra cotta pots along with the ease (and option) of being able to easily move and reposition your plants around. The eggcrate doesn't seem to distract from your display of plants (to 'my eye' anyway) and appears to function as a level support. Maybe you could paint the eggcrate a different color to get away from the white. A unique tile bottom may just be the ticket, though!
The LEDs have really allowed me to easily tweak spectrum and intensity, especially for my vertical set-ups that start getting more than 22" high. Part of the beauty in regards to DIY Leds, is having the ability to customize the lighting for your applications. You don't really have to 'break the bank' in the process if you are are creative and do your homework. Is your 37G about 24" high? What are you lighting up your display with?
Thanks KenP, appreciate the comments. Tillies are great orchid companions. Unfortunately, (yes) they are prone to mealy bugs. I've been lucky, I guess, and never had to deal with the dreaded mealys'. What type of orchids do you have in your collection, and what species do you enjoy working with most?