Went through the same research a year ago. I have notes on my Website you might find helpful: <a href="http://www.wdcnet.net/edward/uv.html" target="_blank">UV Notes</a>
<a href="http://www.Aquaultraviolet.com" target="_blank">Aqua Ultraviolet</a> makes a nice UV, and there are incredibly knowledgeable and helpful.
I should add that on my reef tank I decided to quit using it, and have an ozonizer that provides some of the same benefits as well as a few others. I haven't tossed the UV- I plan on adding a bigger FOWLR latre and I'll use it on that.