Hopefully that tank won't crack. That cat has voided the warranty. No going back now.
How did you decide on your lighting? Can you be specific as to which lights you selected?
My 125 is progressing exponentially slower than yours. Not sure if that makes you feel any better.
Are you still planning on a sump? That would simplify your filtration questions, wouldn't it? Maybe just a sock and then loads of plastic dish scrubbers... maybe some rings as well.
Keep posting pics. I've been following this thread for a while. Great potential. Can't wait to see it full of fish and plants.