I was wondering if DACs are necessary with iMacs. I'm getting a 2010 iMac soon and will be connecting it to my Audioengine A2 -speakers (which are active speakers). I know they should be connected to the iMac's headphone jack. I've noticed that many people use DACs with their iMacs. Many seem to use Nuforce's uDac which is decent-looking and not that expensive. On the other hand, my iMac is arriving tomorrow and I would like to know if I should hold off connecting my speakers to it. BTW, I actually kinda like the silver/black version of the uDac-2 and how it would look below the iMac's screen. The all-black version is nice as well but I have a dark desk and so the silver would make it not so gloomy -- the all-black version could be nicer if the desk was light.