Is this €2,300 gaming PC build ready to buy, or should I change anything?

The overall platform makes sense for a high-end gaming system. The 9800X3D is excellent for gaming, and an 850W ATX 3.1 Seasonic supply is a solid choice. I’d consider a dual-tower air cooler such as a Thermalright Peerless Assassin or Phantom Spirit instead of the Dark Rock 6 if it’s cheaper and fits the case. Also verify that the motherboard has a current BIOS for the processor and check the graphics card and cooler clearance in the case.

The first thing I’d change is the memory. €476 for 32 GB DDR5-6000 is wildly overpriced; a normal 32 GB kit should usually be closer to roughly €100–€150, depending on timings and availability. Check that it’s a 2×16 GB kit with sensible timings, ideally around CL30 or CL32. The SSD price also looks unusually high, so compare it with other 2 TB NVMe drives before buying. Put the complete list into a German parts-compatibility checker to verify dimensions, BIOS support, and current prices.

I wouldn’t automatically replace the Radeon card with Nvidia. Nvidia can be preferable if you specifically want features such as stronger ray tracing, CUDA, or certain upscaling and frame-generation options, but the RX 9070 XT can be a very good gaming choice if its price and performance suit you. The motherboard brand isn’t necessarily a deal-breaker either, though it’s worth checking current reviews and user reports for BIOS stability with Ryzen 9000 processors. The memory and SSD prices are much bigger red flags in this list.