How much can I improve on my old SACD player?
Some quick background: I got back into the audiophile hobby a few years back. I compared an Oppo 105 and a Marantz SA8004 and preferred the smoother sound of the Marantz. Shortly thereafter I tried my first turntable and was hooked in vinyl. The Marantz has been in a storage closet every since. Over the last 2-3 years I've been exploring vinyl, upgrading my components, and improving things like room treatments, vibration control, and power conditioning. I have things pretty well sorted. In order to burn in some new cables recently, I called my Marantz into service for the first time in years.
I was pleasantly surprised that it was quite listenable, and well recorded redbook and SACDs sounded pretty engaging. There is still a somewhat dry treble and many sibilants sound artificial. However, I started thinking about how much better it might sound with a better DAC (tube, perhaps). I've never explored external DACs. I don't want to spend too much as vinyl will still be my main focus. I don't know anything about music servers, streaming, or computer audio. Was just thinking of running my CD player through a better DAC (I realize SACD can't be run through an outboard DAC). I was thinking of something lie the TEAC UD-503 - users describe it as smooth and laid back, it plays all formats through 11.2Mhz DSD and has a nice headphone amp. Musical Paradise has a very nice looking tube DAC as well.
Any thoughts on how to upgrade the digital sound without breaking the bank would be greatly appreciated.
Thanks so much,Scott