Very nice size tank. Will be great for when you decide to convert it to salt.
. In the meantime, my suggestion for fish would be African cichlids. They have the colour and behavior that can rival some saltwater fish. Plus if you have water like ours (Saskatoon area), it comes out of the tap at about 7.8 ph, just right for rift lake cichlids. Save your ro/di for the inevitable saltwater tank. There are lots of great plant friendly LEDs now, add a few anubias, and you're away to the races.
Keep us posted!
- Ian