I thought I'd posted this yesterday, but can't see it now so apologies if it's a double post. Looks like we missed out on a bargain here www.ebay.co.uk/itm/Lite-DAC-83-ladder-dac-R2R-PCM1704UK/294038146159 but not to worry just seen a thread on pfm about an alternative, going to cost you a little more though
www.audialonline.com/s4/ there is a link at the bottom to the newly released S5 which is has introductory offer