How to set up a Mac mini for music only?


I'm new to computer audio and am thinking of using a Mac mini exclusively for music. I am mostly illiterate when it comes to computers and would really appreciate your ideas regarding the optimal configuration of such a mini. I will be running it through an as yet unknown USB/SPDIF converter (maybe Bryston?) to a first generation Berkeley Alpha DAC to my Audio Research VSi75 integrated to my Dali Euphonia MS 4 speakers.
Any suggestions regarding memory, processor speed, backing up, best auxiliary programs to use with Itunes, cabling, you name it would be greatly appreciated.
Also I understand that I can use my ipad to control the whole thing?
Help please?
bixx
Some info on this:

http://www.empiricalaudio.com/computer-audio/

http://www.empiricalaudio.com/computer-audio/recommended-systems

Optimizing any Mini should include powering it from and external DC linear supply, and a good one, like paulhynesdesign.com.

BTW, the USB converter to beat is the Off-Ramp 5:

http://www.empiricalaudio.com/products/off-ramp-converter

5th generation product which has earned a number of best shows at RMAF and Newport and golden ear award from TAS.

Steve N.
Empirical Audio
Please note: Apple recently upgraded the Mac Mini line and it appears RAM memory in not user upgradable. Apple store states:

This Mac mini comes standard with 4GB of 1600MHz LPDDR3 memory. Please note that the memory is built into the computer, so if you think you may need more memory in the future, it is important to upgrade at the time of purchase.