Spend it on a Sump. That'll trick it out.
A Skimmer will definately help with water quality, and proper water movement, yours should be in the 300gph range and above for tank. No need for the UV Sterilizer, they only kill free floating bacteria. Cansister Filters are dicey, they become Nitrate factories in a hurry. Bes to watch your Nitrates and clean that thing out weekly, if not more.
You should also have at minimum 30lbs of Live Rock.
A Sump would get you the best water quality possible, using macro algae and SW plants. As these will suck out the excess nutrients inthe water column.