With audio, you need someone who knows audio/PC's to build your computer....
Not some dude in a computer store who owns FL....
Not some dude at DELL who owns an iPod.......
And
definately dont think you can chose parts and build a computer for audio by yourself (unless of course you are an experienced audio/PC guy)
There are these guys out there, and they will build you a rock solid PC that will even maybe be as good as a Mac (
)