I live through the same experience :desktop audio...
I did not lack anything really... I am not frustrated at all by the minimalistic system in hios acoustic corner and well embedded electrically ...
My sound is immersive...
I have small speakers i modified ...
My main sacred audiophile system is headphone , but the small speakers are just behind it and beat all headphone i ever listened to save my K340 main audiophile system...
Desktop audio can be very rewarding and it’s usually much more affordable than typical 2 channel audiophile systems.
My initial foray into desktop audio: Laptop into xDuoo TA-30 (tube) or my Astell&Kern SP2000T (SS) DAP (digital audio player used for both desktop and portable). My headphones are Focal Clear and Audeze LCDi4.
Not working on surround sound now, farthest I got was Anthem units minimum quality and Trinnov seems like the very best processor. Currently working on optimizing my Ethernet chain: audiophile switch, cables, filters - not easy to keep a lid on the costs.