all depends on what your budget is... and what kind of pieces you around choosing. Give us more details about your budget and the things that you have already chosen
Most modern CPU's can handle music production no problem, also most games are GPU dependent. Now it all depends on what kind of gaming experience you desire ie, resolutions, graphical fidelity etc.
I am building a moderate gaming pc. Gtx660 ti. I as for the rest its still in in the air. Mainly going to be used for online gaming. If 900 dollar budget.
Most modern CPU's can handle music production no problem, also most games are GPU dependent. Now it all depends on what kind of gaming experience you desire ie, resolutions, graphical fidelity etc.
Just trying to run medium high settings. Not ultra..