I think any decent skimmer will do a fine job on your tank. Expect to spend some money on it though. The bargain low priced ones thend to be of low quality, and don't work well. A good skimmer should last many years.
As for UV, I would add it only if you have a specific problem that UV is going to solve. It will not do much for parasitic infections such as ich or velvet. It is good at clearing water due to algae in the water column itself. Think green water. It is also good for clearing bacteria in the water. However, this is not always a good thing. Many times you want a certain amount of bacteria and algae, since it's food for filter feeders. For these reasons, I don't usually recommend the use of UV.