I want to start recording my music. I have m-audio firewire solo and 1500 dollars to buy a computer. I think I want a new imac...will this get the job done? I know I need a decent mic and speakers too. will i need a special soundcard and software as well. I want to make quality recordings of my voice, and acoustic guitar and keyboard and midi keyboard (in the future.) what should i do, what is the most important aspects...RAM hard drive space...thank youfor your help.