tomcarr
Nice choice! The Luxman D-03x is a fine CD player in the made in Japan tradition.
Just under 30 lbs., it has heft to the chassis. Your ears will enjoy its natural, neutral, presentation and sound. Balanced top to bottom without drawing attention to specific characteristics. The build is excellent as well. And yes, this player benefits from model D-10x. I have not heard the newer D-07x. I look forward in reading your impressions and thoughts.
Happy Listening!