Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I have the 500r and used the standoffs that came with it. Those are just holes that look like standoffs. Use the ones provided and put them in order that corresponds to your motherboard.
You will find a good deal on CPU and Motherboard. I'd pick this up from microcenter:
i5-3570k $190 + tax
Gigabyte GA-Z77X-UD3H $100 + tax.
Still comes out a lot cheaper than buying those two parts from newegg.