Need to replace an Oppo HA-1

You have a couple of directions you can go here
 For an all Solid State design my favorites are the iFi Audio Zen DAC v2 at the low budget range,Topping Audio in the Mid budget range & Burson Audio in the upper budget range..
 The second direction,& the direction I would go, is a Tube/Solid State Hybrid design & in your budget range my first choice would be either an xDuoo TA-22 or for even more tube goodness thanks to tube rectification(but still Class A SS final output) an xDuoo TA-30...
What headphones are you using?

Thanks so much for this thoughtful reply!

A dear old friend gifted me a pair of Audeze LCD-2C.

Oh man,nice cans!With those cans an all Solid State,Class A amp will sound excellent BUT if you get the bug & add other headphones, a Hybrid like the xDuoo will allow you to tailor the sound to the headphone with simple tube rolling..For instance a headphone like my HiFiMan Ananda Nano can have a strident,brittle sounding treble with some solid state amps & LOVES a warm tube or HIGH biased Class A Solid State amp,where as something like your LCD-2C’s or my iBasso SR-1’s can sound too syrupy & have flabby bass with too much tube sound...With a hybrid design,a pair of NOS Mullards or new production Genelex Gold Lions would have the warmth wanted for the Nano's & new production Electro Harmonix a brighter sound for the SR-1's or LCD's...
If you really want to explore headphones I suggest head-fi.org...

Thanks man...really appreciated.  I'm sort out of the audio game these days. More into just e-z listening without being too critical of sound quality. I will eventually look into higher rez streaming when I can wrap my head around it..

And after 35 years of having fun tube rolling, I'm done..I think...