Those are Altum angelfish, a wild caught species that are rather rare and expensive. If you want help with planting your tank then I suggest you pop over to the planted tank forum on this site and brush up on some plant care techniques. Believe me, the person who owns that tank is probably a professional. It looks rather Amano to me ( a famous aquascaper). You'd need a heck of a lot more than 1 wpg for that tank. probably metal halides. Get your angels, make them happy and then think about the plants. You can kill fish easily whilst trying to get your plants to grow nicely (I did!). Also, take a look back at your biotope pics. See any living plants in there?
WK