First off, please learn to use the edit button. No need to post six posts in a row.
was just about to post a question on the brand quality of team. so are they any good?
RAM is RAM. As long as it has lifetime warranty, I'd buy it
also if i stick a faster memory in a slot than it can handle than it should just work at the fastest lower rate available right.
Yes, it will work fine
funny that i did 1866 to 2133 but did not think 2400 would be any cheaper.
Yeah it's a special deal, and probably out of stock soon.
so that msi 970a g43 is good enough?
Do you really have to ask on every part "is it good enough"? Would I recommend anything that isn't? That would be a bit stupid of me, wouldn't it?
would the 2600 hypertransport make any spped advantage or long term value over 2400 hypertransport?
The difference between them is trivially small, don't worry about it.
what about adatop memory?
What's that? Never heard. Whatever it is, it doesn't matter, go with the Team kit or the G.Skill kit.
will those timings slow me down at all?
No. Timings are pretty irrelevant, even more irrelevant than the RAM's speed itself. Even if you had DDR3-1333 at CL11 you would not notice a difference to using the PC compared to DDR3-2133 at CL9, say. It would show up in benchmarks but it wouldn't have any real world effect on anything you do with the PC. As long as it's DDR3 and there's enough of it, you're fine.
should i buy the oem or retail windows
OEM
should i buy aftermarket cpu cooler at all?
You'll be fine with the stock cooler since you don't overclock. It is not difficult to upgrade the cooler later, if you so wish. But I doubt it will ever come to that unless you overclock.
difference between 1.5 v and 1.65 v?
0.15v. Both are supported, so it doesn't really matter. In theory, the lower the voltage, the better, but using higher voltage RAM almost certainly has no real world effect on anything. It is typical of higher speed RAM to run at a higher voltage, and if you so wish, you can always downclock the RAM in order to be able to run it stably at 1.5V.