That's a very nice beginning planted tank
. I really like the piece of driftwood that resembles a tree stump.
Cool! Keep in mind that Tiger Barbs are schooling fish that will do best in a group of at least 6. I recommend 10 or more to reduce/eliminate aggression. I'd also pick up 2 more of the glowlights (also a schooling fish). You certainly have room for 6 or more Neons too. Have you considered Cardinals instead of Neons? They're a little larger and more colorful than Neons. Will your gouramis be aggressive with one another? Someone with more gourami experience may be able to comment on that.