If this is a question of demand exceeding supply, with regard to plants, I'll bet our sponsors could help you draw up a short list. While I might know what I (or my buddies) want and can't find, that might not be a big item in demand for the community as a whole.
Give Oppiesilver a yell. He's with AquariumPlant.com, and a fairly active poster. I'll be he's got an opinion on this.
Steve - 33g reef and a 180g planted in need of a re-scape.