Don't do something else!! You're good real good with what you got right now; in a few months, I guarantee you going to have some excitement with the bichirs. Careful with the angel, they really shouldn't look like that. Monitor how it eats and make sure it's not stressed esp with your tiger barbs; they got a reputation for pulling on fins. Also, I think you will need a bigger tank in half a year.
Look into real plants. Vals, and annubias aren't difficult to take care of.
Your full tank shot looks good; bichirs are real cute.