Airport Extreme to DAC

I am not totally sure yet. Still downloading all my songs over 20 hours now so I'm kinda thinking there's something higher than ACC going on. Here is a link

http://www.macworld.com/article/160651/2011/06/how_to_find_and_play_high_resolution_audio_on_the_mac.html

Don't forget to google iMatch also.

Thanks to everyone for the info. One last question..... New Mac Mini with Lion ( iMac upstairs has Lion ) or older one off of eBay with snow leopard and slot for loading CD's , money not really an issue. I'm also thinking I can get away with the brand new 599.00 version
2.3GHz dual-core Intel Core i5
2GB memory
500GB hard drive1
Intel HD Graphics 3000
OS X Lion - Mini will only be used in my rack as a music server.

Thanks Mezmo - I have done alot of research and decided on a used 2009 model mini with a 128GB SSD drive ( no moving parts in my rack ). I concluded that it should be better because of the solid state drive and the detached power supply. I snagged it for a total shipped price of 550.00 and the Crucial M4 128GB costs 209.00 just buy itself. I will get into a oyen digital 2 or 3 TB external HD later on. I'm awaiting my mini and USB cable which should be here early next week. In the meantime I paid 24.95 to put my iTunes collection on apples new IMatch service which transfers my whole library ( of 16,000 songs ) apple doesn't care how you got your songs weather you got them by loading your own CD's or from napster or sucking iPod HD's with iRip or touch copy. I Match puts them into Lossless format and gives album art and allows using " iCloud " to sync the whole library. I should be able to access my whole library and control my stereo from my iPhone or iPad . With this reply to this thread that everyone has help me think and come up with what I hope is a great set up, I hope everyone starts thinking. One last thing. I will dabble in HD Tracks and other Hi Rez venues also.. Happy New Year !!!

Again I want to thank everyone for the input and enlightenment. I finally got all my gear together. Cables and monitor adapters were a pain in the butt. I had to drive to the apple store just to see what I'm doing during set-up. Buying a used Mac mini, the connector to monitor was the wrong one. Got up and running it took some time to set up. I'm checking out songbird and fidelia to use as my player for HD Tracks. Songbird is free, fidelia has a 15 day demo then 20 bucks. I'm sorta liking fidelia but too soon to know for sure. To avoid rambling, I will make one last comment to future readers of this thread... Research, Forums, Blogs, are all others opinions.... These are tools to help and give you food for thought. To get it right ( whatever right is ).. Do the Work