Is this a good 750$ gaming PC build ?

For single cards, AMD is fine, but for two or more, SLI generally works (scaling varies) but Crossfire does not. If you are interested in running multiple graphics cards, I'd suggest going with nVidia unless and until AMD fixes Crossfire.
You may want to get some low-profile RAM to avoid possible clearance issues with the heat sink.
As to that, the Xigmatek Gaia cools within 1C of the Coolermaster but is 6db quieter and is only $20 at Newegg. Both of my rigs use them, and they work well for me.
 

scragnoff

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Feb 6, 2013
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Hi zeMOo!

First of all, congratulations on a great guild!

I would just like to suggest that you go for an HDD with bigger capacity, say at least 1TB. The games that you love to play will usually consume huge storage spaces (> 10GB). I tend to hoard games in my HDD, meaning I don't uninstall them even if I finished them already. If you're like me, 500GB won't be enough.