What Should I Add Next, If Anything?

[ChilversI]

220 litres, 48" (L) x 15" (W) x 18" (H) running on 2 x filters (1 x Fluval 204, 1 x Fluval 305) and 2 x 150W thermostats.
Lights: 1 x powerglo, 1 x plant-gro (36" tubes).
Live plants (lots).
Substrate: 5 bags Eco Complete, 1 bag Cichlid (to control PH), 1 bag Black Sand.
Plenty of rocks, decorations, etc for hiding places/caves, etc.

Occupants:
3 x angel, 3 x dwarf gourami, 4 x pearl gourami, 1 x horseface loach, 9 x sterbai cory, 1 x neon (left over from old tank stock, but happy with occupants ... so far)

Water: Ammonia 0, Nitrite 0, Nitrate 10, Temp 26C, PH 7.5

I am leaning towards ...
3 more angels
school of kuhli loach
more cories

I think the filtration is an overkill for the tank, so plenty of room for handling the bio-load.
I also have another Fluval 204 that I could add, if need be.

Looking for advice as to what I could add from wish list above and/or advice of other occupants that would 'fit in'.

Thanks in advance.

 

[joyboy]

220 litres, 48" (L) x 15" (W) x 18" (H) running on 2 x filters (1 x Fluval 204, 1 x Fluval 305) and 2 x 150W thermostats.
Lights: 1 x powerglo, 1 x plant-gro (36" tubes).
Live plants (lots).
Substrate: 5 bags Eco Complete, 1 bag Cichlid (to control PH), 1 bag Black Sand.
Plenty of rocks, decorations, etc for hiding places/caves, etc.

Occupants:
3 x angel, 3 x dwarf gourami, 4 x pearl gourami, 1 x horseface loach, 9 x sterbai cory, 1 x neon (left over from old tank stock, but happy with occupants ... so far)

Water: Ammonia 0, Nitrite 0, Nitrate 10, Temp 26C, PH 7.5

I am leaning towards ...
3 more angels
school of kuhli loach
more cories

I think the filtration is an overkill for the tank, so plenty of room for handling the bio-load.
I also have another Fluval 204 that I could add, if need be.

Looking for advice as to what I could add from wish list above and/or advice of other occupants that would 'fit in'.

Thanks in advance.

I got striped kuhlis, they're very unique and also cute but i'm not sure whether they'll be happy with angelfish as i bought angels and they turned out to be aggressive and almost attacked my kuhlis. If you decide to get them make sure you get 5 more and that way you'll see them a lot more and they won't be as shy.

 

[ChilversI]

[/quote]
I got striped kuhlis, they're very unique and also cute but i'm not sure whether they'll be happy with angelfish as i bought angels and they turned out to be aggressive and almost attacked my kuhlis. If you decide to get them make sure you get 5 more and that way you'll see them a lot more and they won't be as shy.
[/quote]

Thanks for tip with aggression. My angels seem very placid with the other fish, but as they grow I guess they could become a bit bossy.
By school - I meant 10-12 kuhlis, as I think they should always be kept in a largish group.