Is the Ryzen 9 9900X3D worth it over the Core Ultra 7 270K Plus version?

For gaming, yes. The 9900X3D's 3D V-Cache gives it a clear edge in frame rates, especially in simulation and strategy titles. The 270K Plus version makes more sense if you mostly render, encode or compile.

Can the RTX 5080 handle 4K gaming?

Yes, with DLSS 4 and frame generation on demanding titles. At native 4K with ray tracing and high textures, the 16GB of VRAM is the limiting factor in a few of the heaviest games.

Does the 360mm liquid cooler fit and work well in this case?

It is factory-fitted to the Wizard case, so fit is not a concern. A 360mm AIO is appropriate for the 9900X3D, which runs hot under sustained all-core loads.

How much memory and storage does it come with?

32GB of DDR5-6000 in two 16GB sticks, leaving two slots free on the B850 board for a later upgrade. Storage is a 2TB ADATA Legend 860 PCIe Gen 4 SSD.

What is included in the box?

The desktop itself plus a Resident Evil Requiem game bundle for RTX 50 Series cards. No monitor, keyboard or mouse is included.

Can I upgrade the graphics card later?

Yes. The B850 motherboard and 360mm cooler leave room, but check clearance in the Wizard case and make sure the power supply has the headroom for a larger card.