What the ****?!
220$ for 1gb of 4 cas latencies ram?! Thats a ripoff!!
Get this model from Newegg:
I just recived mine, its as good [or better] than this HyperX and also better than the ones you wanted there.
If you want a better overclocker though [although the twin2x2048-6400c4 are great overclockets, they reach to 1.2ghz or so of ram on 5cas..] then go with the Mushkin eXtreme Performance 2 6400 [XP2-6400] sticks....