I am not sure if you're in the US. The QK65 will have around 600 units as extras for sale on Jan 1. Shipping is going to be expensive tho, around 30usd?

The keychron k series has no customisable keys. Probably only important for the side keys. It's also wireless i believe

The keychron q series has an aluminium case. Will help with sound.

Keychron v series have plastic cases.