There's a bunch of threads on fender eliminators and most of them have gotten good reviews. The Competition Werkes kit you pointed out does require drilling into the battery box, but you can probably get away with using 3M extreme double sided tape instead.
I think it's all personal preference. I went with the Graves kit because it requires no cutting, reuses the factory lighting (my locale requires DOT-approved lighting), and it's nicely recessed into the tail.
Yup that's the one. I think I bought mine from 2WheelPros for a little less. That pic isn't a very good one. It sits more flush with the tail, at an angle. There is a thread on here that has some pictures too btw.