Hmm.... don't know. Really comes down to what YOU want and are willing to spend. Because personally I would splurge on some ridiculous stock 2000mhz sticks, although you really wouldn't see a big difference.
I think the bes tupgrade path would be getting these ones for just 105
And then finding a cheap 30GB+ booting SSD for under 130$.
Otherwise if you can afford both the SSD AND RAM then you can go for some RAM that will OC better. But an SSD will make a much bigger difference in performance for your dollar than spending 100-120$ more on RAM that's only 10-15% faster than 105$ RAM.