The G.Skill memory linked above says "coming soon" - so how long are you willing to wait? I see it also is DDR3-2500 and a 4 GB stick. It does not match the specs you list above it. This will be extremely expensive if and when available. Do you really need it? Are you sure that faster speed will even work in your mobo? I don't know which version of that P6T you have but I did not see that speed, 2500, listed in any of the specs.
The link for the second memory does not work.
Back to the drawing board for you.