I'm not sure yet if I will have the time to do it for you...
But here is my list of "things" to consider.
I'm using UK prices as a reference, not knowing where exactly you are based.
1) Player: Raspberry Pi2, no case, 8Gb SD card, multinational power adapter, on
http://www.newit.co.uk 45.25 GBP
2) Dac: IQaudIO Pi-DAC+ Full-HD audio card, on
http://www.tindie.com 30.01 GBP (45$)
3) Case: IQaudIO Pi-CASE for DAC+, on
http://www.tindie.com 16.70 GBP (25$)
4) Storage: Samsung M3 Slimline 2TB USB 3.0 Portable Hard Drive - Black, on
http://www.amazon.co.uk/ 64.99 GBP
5) Software: RuneAudio 0.3 (or maybe 0.4
)
0.00 GBP ---> 10.00 GBP donation to Rune (at least, you may add more if you want
)
Grand Total
166.95 GBP = 230.07 € (as of today 19/3/2015)
I would recommend Raspberry Pi2 simply because now with Pi2 you should not be afraid of any performance glitch any more and the user base is just huge. It's future proof in all senses since there are various good SW solutions with their own pros and cons (of course Rune rules!!).
Personally I built already 3 systems as the one summarised above (2 for myself and one as a present to a young nephew), so - should I build it - I'm sure I would deliver!