The PC6400 C4D Dominator has never been sent to reviewers so I don't know of any review links for you. If you are looking for a good set of memory with some OCing headroom to run faster than PC6400, then the PC6400 Dominator is not the best choice as it is made with a different IC (Promos, not Micron) than those used in the PC8500 and faster Dominator kits. All Dominator PC8500 and up use Micron ICs only.
If you want OCing headroom and you are interested in Dominator, get the PC8500 or faster speed grade. Also, the PC6400C3D Dominator (Micron ICs) runs low latencies AND typically will clock very well with relaxed timings.