I used a NAC 62/ HiCap then 8200CDQ, Mdac and now 652bd into my HX75. All slightly different flavours and always a digital source (my vinyl is catered for by an AN set up) Probably prefer the 652 though it's a long time since the 62 which was moved on primarily to reduce box count. Better add that this is in 2nd/3rd systems so whilst sounds more than acceptable, to non hifi nerds extremely so, I don't tend to listen critically.