Most popular DD3-1600 mhz RAM chips for $50/8GB?

[diyskeptic]

I'm getting 8GB of RAM for my new system. There are many options for DDR3-1600 at around $50/8GB.

But I want a model that is likely to be widely available at a good price if I decide to double my RAM in the future. Any recommendations? Also, is it even important or necessary to use identical RAM in your second pair of DIMMS?

My build will be:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3550 3.3GHz Quad-Core Processor ($209.98 @ Amazon)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard ($97.55 @ Newegg)
Hard Drive: Crucial M4 128GB 2.5" Solid State Disk ($109.99 @ Newegg)
Case: BitFenix Merc Alpha ATX Mid Tower Case ($36.40 @ NCIX US)
Power Supply: SeaSonic 520W ATX12V / EPS12V Power Supply ($69.64 @ Newegg)
Total: $523.56

And I'll be adding:

-a high performance GPU
-several HDDs and/or SSDs
-a PCI express wifi card
-many USB devices, including multiple charging ports (smartphone, wireless mice, external HDDs)

 

[Pinhedd]

These ones:

http://www.newegg.com/Product/Product.aspx?Item=N82E16820233196

It is not absolutely necessary to use identical memory for a second pair of modules but it is highly recommended

 

[diyskeptic]

Thanks for the response and the edit. Are there any meaningful differences between the RAM you linked and this stuff:

http://us.ncix.com/products/?sku=59431&vpn=CMZ8GX3M2A1600C9B&manufacture=Corsair&promoid=1015

Or is the above also as widely available?

 

[Pinhedd]

Functionally there's no difference. Those ones have heat spreaders on the top. Not only are heat spreaders usually unnecessary unless there's no CPU fan (water cooling or other exotic methods) but the heat spreaders can actually interfere with with some coolers (I have experienced this). Go with the low profile RAM