giel sucks if you ask me. If you're going to be running dual channel, your best bet would probably be to get the dual channel kit.
I say they suck, because I was going to buy some of their ram that is supposed to have TCCD chips, but then they started making the same model with BH5 chips.. so if you buy it thinking you're getting tccd for low voltage oc's, and you get bh5..you can't go anywhere.
I don't know how often they do that, but I do know that you have to have two identical sticks to run in dualchannel, and why risk it buying the two singles if you can't be 100% sure (giel sucks). Some simple research might prove they'd be the same, but I dunno, after finding out the above, I said screw giel