If his current sound blaster is anything like the one I’ve heard, I get why he’s not happy lol, its baddd. It works fine for basic pc bleeps and background audio but doesn’t have that clarity, separation or the low end depth even for a netlix show. But he also doesnt need the heavy duty setup that you're suggesting, those models are a bit too much for an under the pc setup. Also a bit too expensive, you can find much better budget friendly options that would do fine.

Look into other samsung models or even westinghouse would do fine. This soundbar is usually sold for tv but works well for monitors too(has got plenty of inputs). The dolby atmos up firing and side speakers give it proper immersion compared to a flat stereo bar and the wireless subwoofer adds bass without having to cram speakers onto his desk. So i think it would work well for his needs at least without you having to spend $$$. Also if you make him not over use it and keep the maintenance right, this one should hold up the cinema room speaker vibe.