I think if you bred a dovii and a flowerhorn, and kept on selectively breeding it you could eventualy get a larger flowerhornish fish.
And I do like flowerhorns but not the one in the pic above me, its just its nuchal hump is way to huge, its like half the fishs body length, that cant be a happy fish. And it looks like the ats stored in the Kok are keeping him afloat!