I never even thought of rasboras.. They hae always been one of my favorites next to tiger barbs. Also, acording to the chart i have moderatley hard water.
You mean between 3 and 7dGH? There are a lot of rasbora that can work in that range. But you'll still want to figure out the exact number because that's still a large range and will be too hard for some rasbora. What specific species do you have in mind?