I need some more info about your tank to help you out. First off, how much time and money are you willing to put into this hobby? this will effect factors such as potential CO2 injection and how heavy lighting you should get. What equiptment do you currently have on the tank? What are the water parameters? This info will really hep me with my recomendations. I'd check out Aquariumplants.com and LiveAquaria.com to get some ideas and good info about plants.
After you tell me the tank size, parameters, your "budget", and current hardware, Then I can really help you, but this basic information is necessary first.