This looks like a cool little tank! I have done a similar DIY AIO 20 gallon nano myself. I have 4x24w T5 over my tank right now, and am considering trying out the AI Sol on my tank. I will be interested to see how this Vertex unit works out for you.
If you want to see my nano there is a link in my signature. I haven't updated it in a long, long time though.
Maybe I should do that now...