There have been multiple reports in this forum that this board indeed does *NOT* function with memory over 1.6V.
I use the board with 1.5V Kingston ValueRam (which is on the qualified list).
This board is very picky about staying within specs, it is not a tweakers board.
However, when you do stay within specs, the board performs as good as any other and has been very stable for me.
Just don't go experimenting with overclocking or overvoltage, the board is not very forgiving.
Summarizing: no need to pay for HyperX, just stick to ValueRam. You will save some money and it will work well.
If you do want better performance (lower CAS memory etc.), use a different board.