If you really are getting 16gb of RAM in my opinion that's unnecessary. If you're playing old games, you would only need 4gb at most, even for newer games too. Then with the money you saved you could get a better GPU like a Radeon 6850.
Also, an i5-2500k isn't needed for old games, you could get an i3-2100 for ~$100 cheaper and still play new games on decent settings (max @1050) paired with the 6850.
A $500 rig is really all you need to play older games, but I guess I never asked what older games you're playing. Just my two cents, i'm sure others will pop in with additional comments.