Looking good man Any chance of a full tank pic? Good idea on the cherry barb's you don't have any big predators in your tank so they should be fast enough to stay out of the way and add some colour etc.. Maybe the peacocks would have got the WCMM's but I thought they would have got the cherry's too?
As for sexing them, its quite hard, the males are bigger and brighter the females are slightly duller and stay smaller but the only way to tell for sure is when they hold but noticed that the smaller less colourful ones turned out to be females.
Looks like the baenshi is colouring up, how big is he?