A Biorb will work for what you want, it's just that they are overpriced for what you can actually keep in one.
I have a little all glass tank, it's about a 12" cube. Put a little internal filter in there, small heater and a 15w 'energy saver' flouro bulb in a desk lamp and you are good to go for low light plants.
Ian
well the moneys really no issue for me. i'd like to get a tank that i can use again though. plus i heard the the substrate kinda sux for that because its the only kind you can use
however looking at them all the pico blows away the competition...im a fan of salt and fresh so this could be great for later on down the road.
there has to be someway to cover this a bit without killing the light