Sorry, but it's not all about synergy. A crap product will sound bad in any system.
Could the topping be worse than what you have? Quite possibly. The Topping DACs do not have a "huge, deep and wide soundstage". They sound two-dimensional and harsh.
I also know that cables make a difference and use very good Furutech interconnects, speaker cables and power cables, throughout my system. But putting an expensive power cable on a cheap DAC that sounds like an even cheaper one is money wasted.
But don't trust my views - and I'm sure you don't. You own the Topping DAC. Listen to it for a while and form your own opinion. You never know, you might like it. If you do, great. If not, there are plenty of better options.

