It is, if you need all the power. You could save about $70 by getting an Asus 7970 from NCIX, it has a bit better cooler and the GHz Edition subtag doesn't really matter that much, less than a few percent. Can't say much from the peripherals except that they seem ok, although I'm not certain.
Don't even try, you've written that your Xbox account is zach32giants, "his" name comes pretty damn close. Both your and his original builds have the same case and the mouse, the chance for that happening by coincidence is practically zero. You both said that the uses would be rendering, MC and BF3. There's no chance that you're not the same person, there are just too many similarities.
I just can't understand why you aren't taking the advice you're given, you could save lots of money with it. Something like a sound card could easily be purchased afterwards you've assembled the build, if you still feel like you need one.
If you're not doing more than a few videos a day an i5 with 8GB of RAM will be enough.
Detective JPPK saves the day once again!
But, seriously, get the I5 and smaller ram package.