Love the description of dutch aquascaping!! lol
Well, what I had in mind for this tank was stem plants mainly, lots of vallis and hygrophila, and some amazon swords. My biorb is set up in the same way, and the swords go mental in that, so with more space, I'd love to see how big I could get them. I'm thinking a lot more jungle than dutch, possibly with a bit of mopani wood. Defo with a few big boulders dotted around. Planning a trip to brighton beach sometime soon specifically to steal rocks...lol! And the co2 can get stuffed...it's more trouble than its worth IMO.
I started thinking puffers because of how easy the water quality would be to keep good for them with this sort of set up. In my biorb I have no filter, just an airstone. So I was thinking with good filtration too, I should be able to keep perfect water (she says...lol)
I'm halfway between the fish tank with plants and plant tank with fish, I've got the idea for something which I reckon I'll enjoy planting up and maintaining, but I want to pick a fish that will like it in there rather than one that will "look pretty". And ofc any excuse for a new puffer is a good excuse...!!

Defo leaning towards palembangs. Plenty to think about. Just a shame I've now got to wait for the living room floor to be redone before I can redo this tank. o/h spilt a whole tin of white gloss paint in the middle of the carpet!! So we're getting laminate

Just one other question, is palembangs likely to be a puff I'll never see? Obv some fish the more cover you give them, the happier they are to be out in the open. Is that true of them? Or will it likely end up as a game of spot the puffer?