Building gaming pc but need help

i was thinking about following this build https://www.youtube.com/watch?v=uh2_fry7E70 but wanted to make some changes but i never build a computer so idk if its a good idea.

first i wanted to put a 4tb hard drive like the WD Green WD40EZRX 4TB IntelliPower 64MB located here http://www.newegg.com/Product/Product.aspx?Item=N82E16822236604

i also would like to change the ram to G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL10D-16GBXL located here http://www.newegg.com/Product/Product.aspx?Item=N82E16820231528

i want to keep the graphics card the same Gigabyte GeForce GTX 970 G1 Gaming 4GB GDDR5 PCiE Video Graphics Card GV-N970G1 GAMING-4GD located here http://www.amazon.com/Gigabyte-GeForce-Graphics-GV-N970G1-GAMING-4GD/dp/B00NH5T1MS/ref=sr_1_1?tag=teksynd-20&s=electronics&ie=UTF8&qid=1417555412&sr=1-1&keywords=gtx+970+windforce

i also want to keep the processer the same AMD FD8350FRHKBOX FX-8350 FX-Series 8-Core Black Edition Processor http://www.amazon.com/AMD-FD8350FRHKBOX-FX-8350-8-Core-Processor/dp/B009O7YUF6/ref=sr_1_1?s=electronics&ie=UTF8&qid=1421714504&sr=1-1&keywords=8350

i want to change the case to Rosewill CHALLENGER Black Gaming ATX Mid http://www.newegg.com/Product/Product.aspx?Item=N82E16811147153&ignorebbr=1&cm_re=PPSSBGDRYLXVJN-_-11-147-153-_-Product

now i have 2 other problems, ive read on the comments on the video about the motherboard he recommends which is MSI Computer Corp. Socket AM3+ AMD 970 DDR3 SATA3 and USB 3.0 A&GbE ATX Motherboard 970A-G43 located here http://www.amazon.com/dp/B00AQ9CF8K/?tag=teksynd-20 isnt a good one and if its not does anyone have one that might be good around the same price?

and the second problem is im not sure if the power supply will be enough because im changing some things around EVGA 600 B 80 PLUS BRONZE Certified 600W Active PFC located here http://www.newegg.com/Product/Product.aspx?Item=N82E16817438014

im open to any suggestions and switches. this is the first pc im going to be building and all the help is welcome.


TBH that build is  a little out dated and kind of a mess. 

What is your budget? What do you want to do with this PC? Are you okay with mail in rebates?

ya im looking to upgrade my slow toaster of a computer. i want a computer that can run leagues of legends on max, maybe play games like rift/wow without lag, download movies without worrying about space, and have a computer that will run fast even with alot of stuff on it. im ok with mail in rebates, im trying to build a computer for around 700 but will pay up to 900 to upgrade important stuff

Looks good man, that's a beast PC. I would go for it!

 

You might want to grab a better motherboard though, maybe a m5a99fx pro r2.0, or asus sabertooth 2.0

ok but do u think the 600 watt will be enough to run it everything i got?