No doubt that the other recommendations (Meitnor, PS, T&A, etc.) are excellent. I think your budget improvement from what you’ve mentioned in your original post is to look at a separate DAC for your digital files, possibly use the 306 as a transport for CD, and continue to use the 306 for SACD. I have similar Cary gear to yours.
Even if you want to stay in the Cary family, they had a DAC200ts for less than $2k a week or so ago, which IMO is a much better standalone DAC than the 306 is as a DAC.
Options for DACs are endless.
As others have noted, if you want to upgrade both DAC and SACD player, probably going to cost quite a bit more to confidently get notable improvement on both fronts. But, of course, you'd have the value of selling or trading the 306 to offset that.
Even if you want to stay in the Cary family, they had a DAC200ts for less than $2k a week or so ago, which IMO is a much better standalone DAC than the 306 is as a DAC.
Options for DACs are endless.
As others have noted, if you want to upgrade both DAC and SACD player, probably going to cost quite a bit more to confidently get notable improvement on both fronts. But, of course, you'd have the value of selling or trading the 306 to offset that.