you are thinking of a leopard ctenopoma MHc. he is wanting Monocirrhus polyacanthus the amazon leaf fish or Polycentropsis abbreviata the african leaf fish. i too think i'll get one of these guys for a 10 gallon tank. they are pretty hard to get off live food, so you'll probably have to get a good source of guppies.
i seem to like leaf fish, i have a Nandus Nandus, leopard ctenopoma and hopefully get an amazon and an african leaf fish haha.
but ya i'd go with one of these leaf fish, they are pretty sweet although a bit boring sometimes. they don't do a whole lot, but when they do you really start to enjoy the fish.