Theres nothing wrong with using 1.65v ram nor is there anything wrong with overclocking your ram if that is your intention. If your system supports 2000MHz ram and is able to feed 1.65v to it, then that set will work just fine.
I do understand the concern with using 1.65v ram and with overclocking to acheive stock speeds but if OP is aware of those caveats then the answer is yes, that is good memory to buy for your system. You never mentioned a motherboard and that is important in determining if your system can appropriately accomodate that ram.
thanks for your answer, I did mentioned my motherboard
as you can see in my post, its gygabyte g1.guerilla