I think that filter does 350 US gal per hour, which sounds better to me than litres, else not knowing it neither. (Sorry Penn if I understood you wrong, I thought you meant litres with "L".)
Think if it was my tank, I'd go for 2 Oscars and the clown loaches, I'm just all for clown loaches, very entertaining fish. But considering their possible size, that might be still too much
Bala sharks are really beautiful but I'd leave that one out because they are happier when kept in a group.
If going for the bala sharks or clown loaches, I'd try to get them at a bigger size than the cichlids as at least the loaches don't grow fast and might become food at some point.
If combining Oscar and Texas cichlid, I'd probably try to get a texas that's a bit smaller than the Oscars. No experience with those at all but read they rank higher than Oscars on the aggression scale usually.
Well, just my 2ct. It sure sounds like you're going to be quite deep in the fishy stuff again soon:lol: