That is a reef tank with 2 compact fluorescents so you are going to have a lot of light. It will be fine for freshwater and great for a planted tank. You may even find that you have too much light.
Looking around some more, it appears to come with one actinic light. Ditch it and replace with another 10K 36 watt fluorescent. Most plants won't respond to actinic but algae loves it.
I missed your question about saltwater. It is way more difficult. With these little nano cube systems, some of the work has been taken out of it, but it is a full time hobby. Saltwater is also very expensive. Seriously, just set a pile of money on fire.
I don't want to talk you out of it because it is very rewarding, but you know, "eyes open" and such.
To give you an idea, I had a large reef tank that cost me upwards of around $4000 - that's not counting all the chemicals I had to buy to maintain my coral - sump, protein skimmer, live rock, water pump, metal halide lights that were too hot so we also had a chiller, etc... And on and on and on.
My husband and I went away for a long weekend, and my brother-in-law was charged with feeding my fish one day. He came by on Sunday and fed the fish. He also nuked a burrito in the microwave and somehow blew a fuse. He checked every fuse in the fuse box except the one the tank was on. When we came home, the tank water looked lke milk, and everything was dead. Saltwater holds less oxygen than fresh, and so must always be in motion to aerate the water. No power = no water pump = suffocated fish. When the fish died, they released toxins into the water that killed off the coral. It was a total disaster. It makes me angry just writing about it. My poor critters. :(
Tldr version: it is a very rewarding hobby that can be full of heartbreak.
Last edited by pasoindy; 02-21-2012 at 10:24 PM.