I personally use a Fenek mouse and keyboard from epicpants/tek (really). They’re the best value for money. If you want to go mechanical however and have got a lot more $$$ to spend I would look at a custom keyboard from either wasdkeyboards dot com or Unicomp (they’re the only ones selling the Model M, which is dearly loved by its owners).
The Fenek Standard Issue mouse I use because it’s got the Intellimouse form-factor, a great sensor and it’s half the price of a Zowie. I used to own a Zowie, but once I tried the Fenek I gave that one away to someone who needed it most.
Everyone has got their own requirements for how many keys/buttons they want on their mouse/keyboard combo… so some of these might not fit your bill. But they’re good options I think regardless.
Before the Fenek combo, I used to rock a Cherry keyboard, with Cherry MX Black switches. I’ve given that to my partner. I do miss how much faster I could type of those switches, but not by much. It really depends how much dosh you got left. For budget builds though the Fenek stuff will be better than any brand gaming hardware - that’s for sure.