For a nice schooling fish with great colour why not Boeseman's Rainbow, they should also hold their own with Tiger Barbs and how about either Kribensis or Apistogramma Cacutoides as your cichlid's. That is what I am in the process of setting up and I also might go for the Praecox rainbow or clown loaches. With that you should have plenty of movement in the Rainbows and the Tigers but also interesting behaviour in the cichlid and the loaches.
Kieran
Kieran