RAM and SSD for MacBook Pro Retina Display

Hey guys. I just ordered a new 13 inch MacBook Pro with Retina Display. I followed a suggestion I saw online and ordered it with minimal RAM and SSD space, and I'm planning on buying those separately and upgrading myself (since it would be much cheaper than the prices that apple offers you) (Oh and I have experience with opening macbooks and upgrading hardware Happy).
I found a couple options on amazon, and I just wanna get some opinions as to which is better and known compatibility with macbooks.

I found 2 RAM models:

and 2 SSD models:

I would appreciate any feedback that would help me chose which models to purchase.

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For RAM I get that from
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I'm sorry but you may just have made a big mistake with

the RAM and possibly with the SSD too.
The specs on the 13" MBP with Retina Display show that it comes in two configurations:
8Gb and 16Gb onboard memory.

As for the SSD, not sure where you see the guarantee that this fits, and operates, in a MBP


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