Well this is my first time building a computer and it's pretty exciting.

I was wondering if you could tell me if everything should be compatible from my choice of items?

CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16819115072
CASE: http://www.newegg.com/Product/Product.aspx?Item=N82E16811119225
MotherBoard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128510
Memory: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
CPU Cooling fan: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065

and the rest of the parts i'm just gonna take from my old computer and attach em in the case.
If you are able to recommend me BETTER and cheaper products please do.

I ALREADY have:
The Graphics CARD / Video card
Power supply
HDD

so I wouldn't need to purchase those items.. Anyways leave your suggestions and if there's something wrong with my build do tell
You won't be able to PUT an i5-2500K into an AMD chipset board. You might want to consider this board:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131730R
The Z68 series are the at the top of the Intel chipset hierarchy, just like the AMD 990X chipset is at the top of the AMD line.
What do you want to primarily use your PC for? Video Editing, Gaming, General use, etc.
If you want to upgrade your graphics card I want to recommend the nVidia GTX 550 Ti-much cheaper($100 in some cases)than, say, the GTX 460 and performs ~20% better.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127577
MSI N550GTX-Ti
http://www.hwcompare.com/9692/geforce-gtx-460-vs-geforce-gtx-550-ti/
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&N=100006676&isNodeId=1&Description=GTX+460&x=0&y=0
GTX 460 Prices.

You can take a look at the links below:
http://www.cpubenchmark.net/high_end_cpus.html
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i5-2500K+%40+3.30GHz
The i5-2500K provides one of the best price/performance ratios of any CPU on the MARKET.