enough light? hehehe my friend, that is MUCH more than enough light. The only thing in a fowlr that is photosynthetic is the algae. If you stick to that lighting you could very well put in a few kinds of live corals later. Fish generally don't care much about light. Some fish/inverts prefer low light but it won't be a problem so long as they have holes/overhangs/crevices to hang around in to escape the light (stay away from the light!!
).
Some people have given bio-balls a bad rep because they think they produce a lot of nitrates. And they do, but only if you don't bother cleaning them once in a while. Once a month or so i think. I wouldn't use bioballs myself just because im too lazy and will forget to clean it. I don't think its really that necessary if you get a good skimmer. Even less necessary if you got a mechanical filter. If your filter has a place for bioballs and you decide against them, you can fill it with LR rubble or activated carbon.
think about how much maintenance you'll be doing on a regular basis for this tank and how much time you can afford to spend on it.
ive heard plenty good things about the later edtions of the eheim canisters. No experience with them myself though... anyone else got input?