M2Tech's superb HiFace2 *USB/S/PDIF converter *and the their HiFace DAC async USB at 32/384 are both back in stock.
The HiFace2 doesn't require drivers for MAC and Linux, just plug and play, srp is £140 inc vat and insured delivery.
The M2Tech HiFace DAC *has a 3.5mm mini jack connector ,again plug and play, works perfectly with Mavericks, srp is £180 again inc vat and insured delivery.
Keith.