Well I'm not part of your team, but my REX board absolutely loathes my OCZ hyper rams, yet it clocks nicely with the GTR's. I'm stuck at 1980mhz with the Hypers, no way they do anything stable at or over 2000mhz.
It could be my board (I can't go over 630FSB), but I've seen this before with eg Eva2000 and others... If I have a FSB that keeps the rams sub 1980Mhz I use the hypers for tighter timings, if I go at or above 2000mhz GTR's is the way to go for me.