Good for you! You have discovered that more expensive kit doesn't always buy better sound.
I also bought the SVS ultra for my son on a close out special. What a bargin! Paired with a SB-2000. Wow! it sounds incredible. We upgraded his amp to the Galion TS-A75 and then we switched out his DAC.
Just for a fun experiment...we got an inexpensive Aune X-8 DAC on an 'open box special' for just over $200 and replaced the op-amp with the Sparkos ss2590 for another $100. This turned out to be the least amount of money that yielded the biggest improvement of all. ( replaced his Schitt Asgard).
We're done!!