An excellent choice, if you are serious user and want performance, stability, AUDIO, working with a professional DAW as Cubase 7.
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You can choose your own quality components with PC,
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The stability on the PC are much better then MAC OSX.
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Performance like “night and day” compare to MAC-slow…
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Work, Record with “low latency ASIO-audio” ,OSX Core Audio can’t even handle a normal buffer setting without drop outs.
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Use 40-75% more plugins on same setup VS on same computer with OSX-MAC…
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You use “Wave files” that load and read twice as fast as AIFF-files,
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You have security, no one can hack and take over your computer and all the files in one second, VS no security, non existed on MAC, open like a book,
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Use latest graphic cards and drivers and work in crystal clear graphic and VIVID colors → no more MAC dull grey environment that make eyes go bad.
So everything is better on a PC Windows 7 x64 compare to any MAC computer. Windows 8.1 x64 gives you even better performance and stability then Windows 7 x64.
Plugins =38plugins in Cubase on MAC VS 130 plugins in Cubase on PC. In this example 71% more plugins on PC.
Check the number on Pro Tools MAC VS PC and you see even more performance gain on PC like almost 90%
Welcome aboard! 
Best Regards
Freddie
Regarding overall audio performance, multimedia, graphic etc. Anything you throw at it Cubase 7 will use it.