HI Si,
Let me know if you need any plants
would ditch some of those fish but then it woudl be my tank...lol
Sumps are fine with planted tanks
great as a matter of fact.
You just need to be thinking differently
would go for all gear in sump and in line CO2
May want to use your HO lights on sump as a refuge and add baffles to decrease bubbles
Look into dwarf neon gouramis for a fish type
now you are going hi tech plant what bio type you looking at?