iMac vs. PC Laptop

I am currently weighing the pros/cons of an iMac vs. a PC laptop for a variety of uses at home, including as a digital music server. Can someone educate me on the pros/cons of each as they pertain specifically to setting up and running a digital music server? Ideally, I would like to go wireless to a DAC.

The rest of the system is a Rotel 1067 pre-amp/1075 amp, Paradigm Studio60 V.3 speakers, matching center and rears (current sources are Music Hall CD25.2 CD player, Oppo DVD).

Thanks to all.