We are talking about $30-$45 (~5%) on a $700 build (I'm assuming you already have keyboard, mouse, monitor since there's no mention of them). The above mentioned coupon code covers that and then some. Being that it's your first build, that's all the more reason to consider advise from much more experienced people. Having to ask if parts are compatible because you don't know (which I don't mean as an insult) and then disregarding recommendations is kinda silly. I've built every thing from $500 bargain builds to $100k server racks. I'm all about building efficiently. Buying the most expensive parts are never worth it, but buying excessively cheap parts is equally bad. Buying a significantly slower part to save $20 is just shooting yourself in the foot.
I can understand there's money concerns but when building a computer you also need to be realistic. $40 is one mag for a GBB or 2-3 mags of BB's. Not to mention some of my recommendations aren't even talking about spending more money. You can't use the extra speed of the 6Gbps SATA on the board you picked out but are paying a premium to get a drive that supports it. You can get an otherwise identical 3Gbps SATA drive for cheaper. I mentioned the other drives purely as a performance recommendation. The 880G boards can be had for the same price as the 760G. The 970's are pretty close on price as well.
Being on a budget makes good first purchases all the more important.
