Hi,
I only created this account to comment. I would recommend looking into the MonsGeek M1W prebuilt with piano switches. The original MonsGeek M1 is highly praised within the custom keyboard community for being a really good budget entry with a full aluminum build. Stock m1w is already amazing but you can mod if you prefer a different sound profile.
Zellsis also uses an M1 MonsGeek, which you can see in one of the Cloud9 Twitter videos due to its distinctive gold side bezels.
The most important thing for gaming is obviously good latency and 1000Hz, both of which the M1W has. The switches on the piano are very light linear, making it great for gaming. Here is a spreadsheet listing the best latency options. Obviously, the Wooting keyboard is the best, but I personally don't like plastic 60% keyboards since I already have many, so the 75% (like GMMK) is more suitable for me.
https://docs.google.com/spreadsheets/d/1ZZPa8LdSqu3ObpqX4NKYb9gdp6tRUqMjMc6bDPvU9X4/edit#gid=0
https://www.youtube.com/watch?v=Ejrn_VL7OoA
I also checked out the DrunkBeer, but as you said, it's a pretty light plastic build and is pretty much inferior to the Wooting, despite being $100 cheaper.
If you are willing to wait, there could be a rapid magnetic switch M1 releasing soon since it's currently in the works. However, based on the previous Akko Mod 007 7th anniversary, their magnetic switch was a disappointment (Akko is the parent company of MonsGeek).
Here are the sources:
https://www.monsgeek.com/new-arrival/
Sources: https://www.youtube.com/watch?v=Pk4e327bWPE (not good impression)
Please let me know if you need more information or assistance.