server build

[Scratch]

ok a couple friends and myself run a private gaming server and we pay monthly fees for the server and to host it so we've decided to build or buy our own...now comes the problem lol
I've built a few pc's but I've never built a gaming server before. As far as I know I could probably run one on the rig I have lol but seriously;
I'm thinking 2x dual or quad cpu, 8gigs ram and mirrored Raid. Any suggestions would be greatly appreciated