nice choice dude. Next think about plants to decorate your rocks/wood, aka java fern, moss, and anubias. Your wpg is pretty good; it constitutes medium lighting. With CO2, and your lighting, you should be confident that the plants will do well, so start thinking about how you want the tank to look when the growth becomes thick, and also think about short plants for the foreground. For a tank of that size, I would recomend a mix of crypts with either echinoderus tellenus, or sagiteria subulata. I myself have some sagiteria in my 20g and it's quite an impressive plant-- ridiculously fast growth of a short plant in only 2wpg, with no CO2 as I'm still messing with that.
edit--> If you want to see a great example of sagiteria, look at konrad's tank in the contest threads. It's the grassy plant in front.