Give it a whirl and see what you think. The 3800 had impressive specs given the time frame that it was made. The Oppo is no slouch either. I assume you'll be using analog out connections. The AKM 4458vn in the Oppo is a pretty nice dac and sounds nice with my headphones. For speakers I use HDMI connections.
Supercharged Song Towers, Oppo BDP-203, Anthem MRX-520, LG B6 OLED
Headphone Rig: Oppo BDP-95, Burson Audio Soloist MKII Headphone amp/ Sennheiser HD800S, Sennheiser HD650