Building/upgrading new gaming pc

[DismalNether]

Hey, I've been saving up for a while now to upgrade my pc. Parts I'm looking at are

Case: Coolermaster HAF X 942 http://www.newegg.ca/Product/Product...82E16811119239 $210
CPU: intel i7 3770k quadcore 3.5ghz http://www.newegg.ca/Product/Product...82E16819116501 $350 (Also if someone could explain the differences in these http://www.newegg.ca/Product/Product...82E16819116502 and http://www.newegg.ca/Product/Product...82E16819116503)
Motherboard: Asus Maximus IV http://www.newegg.ca/Product/Product...82E16813131760 $336
GPU: Sapphire 7970(carrying over from old pc)
HDD: 1.5TB Western Digital(carrying over)
RAM: 2x8GB 1866 DDR3 http://www.newegg.ca/Product/Product...82E16820231528 $151
PSU: Antec 750w high current pro(carrying over)
Heatsink: Looking for some help with this, preferably within $80-$100
Price: $1127-$1147
I think I've mentioned everything required. Mostly looking for some opinions on the build and compatibility. Wanting to stick primarily with specs in this range and I would enjoy suggestions regarding alternatives to the chosen parts.

[inux94]

3770S is an underclocked version IIRC
3770 is a locked version (meaning you can't overclock)
3770K is an unlocked version

But disregard them all & go for the i5-3570k, you will see the same performance in gaming.

The Maximus IV is a generation old. If you're into looks the Sabertooth is more for you. http://www.newegg.ca/Product/Product...bertooth%20z77

If you want price =/= performance get the ASrock Z77 pro3 http://www.newegg.ca/Product/Product...k%20z77%20pro3

[BicycleMafioso]

3770S means it's using less power, so you can get away with a 100-200w system at most
3770 means it's the regular CPU
3770K means you can increase the multiplier far beyond the stock and thus overclock it.

Thoughts;
* Unless you're heavy into rendering/movie editting et c, get the i5 3570K instead.
* Get a Z77 board rather than a Z68 board.
* Consider an SSD.
* RAM is overkill, unless you do more of the above work.

[DismalNether]

What exactly is the difference between an i5 3570k, I noticed it supports up to 1600mhz ram so as for ram are you talking about the 1866mhz being overkill or the 16gb? Would 8gb of http://www.newegg.ca/Product/Product...82E16820231400 be sufficient to future proof or should I go for 12gb? As you can probably tell I have not done much research into this field, primarily I've looked at cases and decided upon the one in my original post. Also still wondering about heatsinks.

[Berserker Cronus]

By the time you need 16GB of RAM it'll probably be time to upgrade again. And if not you can add some later. Go with a 2x4GB set, and make sure if the sticks have wacky heatsinks on them you'll be able to fit whichever cooler you choose with them installed.

[DismalNether]

Alright thanks for the advice, I think I have a general idea of where to go and cut off some fat as far as the cost goes while keeping performance up now ^^