Is the 600w 80 blus bronze cosair in my build to little?
Probably not. But a 500w really would leave too little... 600w should easily run any Intel build (and intel builds for the next gen since they continue to use less power as time goes on)
It won't leave room for SLI or CrossfireX builds but you likely won't ever do that.
500w would be plenty. His current build plans won't consume anymore than around 375w. This is assuming he went the 3570k and HD 7870 route. If he were to go with a HD 7950, then it would consume closer to 400w (and I'm being generous; during typical real-world use, it would consume less). This still leaves plenty of wiggle room for overclocking and such. However, since it appears that the CX500 and CX600 are about the same price, I would just suggest that the OP go with the CX600. That's what I'm running in my build, and it's a great PSU. I haven't had any problems with it so far.