Processor and Memory

Hi guys, I am new here, so I hope I can make the question in the right place.
I wanna to buy a notebook, but I still have some doubts about the configuration:
1) Is there a huge difference in speed between the processors i7-3820QM and i7-3720QM. Which do you recommend?
2) Is there a huge difference in speed between this two components:

16GB [8GB x 2] 1333MHz DDR3 SDRAM [Laptop Memory] Corsair or Major Brand

16GB [8GB x 2] 1600MHz DDR3 SDRAM [Laptop Memory] Corsair or Major Brand

Which do you recommend?

Thank you very much for the attention guys!

 

The 3720qm will be plenty of processor for you. The memory I would order the cheapest amount from the maker and install your own if you feel the need to upgrade...speed again not much of difference here, but if the price difference is very little, I would get the faster.

 

There's not even that much of a difference between the i7-3160QM and -3720QM other than some specialized functions. My rule of thumb is if you have to ask what they are, you probably don't need them.

There's no real difference between 1333MHz and 1600MHz other than in gaming on the Intel GPU (even then the performance gain is only marginal). The only reason I'd ever pick up 1600MHz is if the laptop already comes with a stick or two of 1600MHz.