Help me decide on a fishy or two

[Ruth]

Well I was going to leave my 100g fishless and only have SPS corals but it is kinda boring without any fish sooooo....... I would like to add a couple of fish. It is a cube tank so IMO any tang is out. It is a BB tank so no fish that need to sand sift. I also don't want to be feeding this tank very much or very often - I had thought of a small school of anthias (sp) but I understand they require quite heavy frequent feeding.
Would like to have something a bit unusual and colourful. I have thought of a small group of Helfrichi firefish but am looking for other suggestions as well.