Those forktails are going to be stunning. They're mid-upper swimmers, if I remember right? Maybe something with a contrasting color that would venture into the lower areas, such as Black Ruby Barbs.
With the kuhlis, I'd be a little concerned of conflict with the Bolivian Rams, since the pair might try to make a nest and then the bottom-feeding loaches stumble right into it. Maybe not, though; I've never kept that combination.
Pics as it develops, please!