We get into a lot more detail in dedicated reefing forums regarding building LED lights. Since this is a small tank, Nano-Reef would likely give you a lot more depth in terms of salt water applications.
Since I build a lot of reef lights, the best I can do is advise against 1watt LEDs, unless you just happen to want a lot of low powered LEDs. A Cree XP-G at 700mA *easily* matches or exceeds the output of three of those (typically Chinese) 1watt LEDs.
Next, individual 10k and 20k LEDs are a marketing gimmick because they are just a weak cool white with even less warm spectrum. Royal blues plus standard cool-whites or neutral-whites (2:1) are the way to go and will provide the best color.
Last, the driver doesn't help you because it's just a basic 12volt supply. You need a buck type LED driver added to the 12volt supply for this. Or, a dedicated LED / AC power supply which doesn't cost much more.