Wait till DC price comes down
Yeah there is no 'DC' RAM to wait on in the first place. When you see low latency kits they are just tacking on any information to possibly up the price. So not only is it high performance ram they says it's "DUAL CHANNEL!" RAM too, which all that means is those two particular sticks have been tested and are guaranteed to run in DC as long as your motherboard and CPU support it.
You can buy one stick now, and one stick of the same down the road and DC still not work, sometimes it's a gamble when buying two sticks of valueRAM at different times. Sometimes DC will work, sometimes it won't.
Most reviews however, agree that the performance increase created by ram running in dual channel is minimal.