Having a CD player modified is absurd. In most case's mods are done adding a tube stage to obtain a richer, more analog sound. There are certain players that are somewhat sterile and bright and others that are warm and relaxed. Marantz, Luxman and Accuphase are near the top of the chain with the most organic analog sound. Marantz offers the best value on the market if you after a very smooth, full midrange, with warmth and bloom that is closest to analog. It makes more sense to switch out the fuses with HiFi tuning fuses in the Marantz that will improve the organic, analog character without the need for mods.