Its actually not smart to Overclock the baseclock because other devices are also linked to that bus speed.
So if you go to high you might end up corrupting your hard drives etc,
It can give a nice little bump to go to 101 or 102MHz for some memory bandwith benchmarking, but for daily use its not recommended.
My advice is that you run 2133Mhz and try to tighten your timings as far as possible.
Maybe even up the Dram Voltage a little bit to maximize your timings for maximum memory bandwidth.
I see your kit is recommended for 1.5v to 1.65v, So just see how far you can get on 1.65v.
Then you can allways try 1.675v or something but i would not go over 1.7v Dram Voltage 24/7 but i read other people saying its fine.
From what i see on my 2500k, if i run 4.0GHz 1866MHz ram 9-10-9-28 1T i get 23GB/s and with 4.9Ghz same memory speed/timings i get 28GB/s. (These are not the real accurate numbers, but ive tested and this is as close i can remember, just as an example)
So if you can Overclock your CPU you get more CPU performance, More Ram performance = More total performance... hehe