Awesome tank [emoji4]
I have a planted 600 gallon with a sump myself [emoji6]
http://www.plantedtank.net/forums/showthread.php?t=486449
Your woods look amazing and the lights are great.
One thing that worries me is the stand. The water and acrylic would weigh more than 3 tons. I feel you need supports in the center too. There will be a lot of shear stress at the middle of the tank, because the supports are nearly 8 feet apart. It's better to be safe than sorry. See if you can add supports along the back atleast. It might not be possible to make any changes unless you empty the tank though.
I suggest you go as low tech as possible unless you have the time, interest and money.
In my tank I do water change and maintenance only once a month. The only work otherwise is feeding thrice a day, topping off when necessary and just sitting in front of the tank and enjoying it.
I do add micro and macro dyi ferts once a week or so if I remember to .. About 1/5th EI dosage.
Adding CO2 can make your plants grow 10x faster.. which might be a nuisance. Imagine bending over the edge of the tank and working for hours to prune the plants.
Every tech you add to the tank is a possible thing that can go wrong and one more thing to worry about.
You have many options for the choice of plants even if you decide to go low tech.
Another advice.. Be conservative with your lights. Less light is always better. More light than what you need will end you up with an algae farm. You can monitor your tank for a few weeks and adjust gradually.
Buy your plants in bulk and plant heavily to outcompete algae.
Do a LOT OF RESEARCH before you decide on any plants or fish. It's a PITA to catch a fish in a tank this big. The fish should be compatible with any small fish you have and the plants.
I have schools of cardinal tetra, discus, elephant noses, pearl gourami, clown loach and many others.
If you want plant compatible cichlids, you can keep rams, rainbow cichlids or Elliotti cichlids other than Discus and Angel fish. If you don't plan to have many plants in the substrate, you can keep many geophagus species.