KKCOBVR Q3 Halo Strap Compatible with Meta Quest 3/Quest 3S Enhanced Comfort, Replacement Elite Head Strap Compatible with Oculus 3/3s by Adjusting The Side Knobs

logitech sells speaker upgrades for the quest 2, you can get 3d printed holders for sennheiser hd25s, sony ZX110s and koss porta pro compatible driver assemblies and clip on cups to direct the existing speakers at your ears, you cannot use over ear headphones with most VR headsets because the headband is too close to your ears for that to work, using a psvr style halo strap might work with some heads