Oppo is usually considered to excel far above its price range, and... they are coming out with new improved versions.
But... it is always possible that better speakers, room treatments or digital 'shaping' of the speakers (e.g. DEQX or other) would be much more cost effective.
or.. maybe the source material can be upgraded with remasters, etc.
Opo has always allowed you to try a unit for 30 days, a very generous policy, so...