i have to say that i will probably pick the Blau Aquaristic tank, for the difference in volume as you mention, the price is between the ADA and Do-Aqua, it's a good compromise
For the fixture, i just looked at the ATI dimmable 36x4watt, looks nice, but must watch out for budget. i like the controler in it!!!
I will use T5HO for sure, still need to decide 6700k or 10000k.
I did not plan to use a wet-dry sump, i believed it was mainly for Reef aquarium. but i will read on it. It seems it help to have a crital clear water!