The 3 brands I mentioned are solid choices, with Ducky I think offering the most “flashy” options (RGB-wise but also feature-wise). Have only owned 2 Duckys but they were secondhand-purchases that are 6 years later still going strong after a lot of abuse.

The Glorious GMMK is hot-swappable, meaning you can just pop the switches in-out without having to solder anything, so if you’re set on certain switches, it’s a good option.

I think the special feature about the Das keyboard is probably the media controls, so finding a replacement/similar build should be easy :)

If you want something with more click but the same noise-wise, you could look into the Kailh Box Royal switches? They’re definitely a lot more tactile than browns (which imo feel linear over long periods of use). If you want dead-silence, check out Aliaz silent switches, they’re browns but with silicon at the contactpoints so they’re quieter than normal non-mech keyboards.

When it comes to pre-built keyboard brands, Ducky, Leopold, Vortex are all good options. A Glorious GMMK keyboard is probably the safest bet though, and good price/performance.