First Time OCing - RAM Choices

I'm relatively new to Overclocking. I was able to overclock the processor on my current machine a little bit, but it wasn't built for overclocking so I ran into some limitations. I decided with my new computer build that I wanted to overclock, and am trying to select parts with that in mind.

What I have so far is:
Intel i5 2500k
ASUS P8Z68 Deluxe

I've ordered the processor, but haven't purchased the board yet. Today I'm looking for RAM that would work well with what I'm intending.

I'm not too familiar with RAM. I'm reading and learning as I go, but I thought it might be best to talk to some folks who know what they're doing.

My first question has to do with the speed. The board I'm looking at supports 2133 17000 at a maximum. If I purchase RAM at that speed, will the board be able to handle it if I want to change the timings for better performance? I've been assuming that it can, but it'd be nice to have some validation.

My second issue is less of a direct question, and more of...something that I am just unable to figure out. I'm looking at different RAM and many of them look exactly the same to me. The difference in price is sometimes only a few dollars, but I'm just curious about what I'm missing. As an example:

G.Skill: http://www.newegg.com/Product/Prod [...] 6820231518
G.Skill: http://www.newegg.com/Product/Prod [...] 6820231476
Mushkin: http://www.newegg.com/Product/Prod [...] 6820226200

Particularly between the G.Skill and the Mushkin, there is a $20 price difference and the timings, voltages, and all that appear to be exactly the same to me.

Hi and welcome to Tom's forum.

1) All those RAMs are 1.65V and recommended voltage for SB CPUs is 1.5V, take a look of this Corsair kits http://www.newegg.com/Product/Prod [...] =BESTMATCH all those are 1.5V with good prices and quality.
2) The Mushkin link isn't working.

1600 with that CPU is an excellent option, the other two sets have CL a little high and that's not good.

Yeah, I think I'll be going with 1600.

One thing I'm running into though is the motherboard's Supported Memory list. Most of them seem to be 1.65V, or are old. The board supports up to 32 Gigs, but if I were to select only from the provided list, the most I would be able to get is something like 8.

Is that something that is safe to ignore? Could it just be that their list is out of date? I mean, I've found some 1600 RAM with good timings...but I don't want to buy it if it isn't going to work properly.