Yep I second this. I have a K1 (I think) with blue switches. The switches are the most important choice - since that controls the entire feel of using the keyboard. When I first got mine, I got red switches. But red switches don’t give you any tactile feedback when it passes the threshold to be considered “pressed”. I swapped to blues and I love them. Very satisfyingly clicky. They’re a bit loud though. Swapping switches is easy - I think the replacement set of blues just set me back $20 or something.

If there are any computer shops you can go in person to try them out, I highly recommend it. They make a lot of different switches and the feel is a very tactile, personal thing. (Though I think I’d also be happy with yellow or brown switches after some time with them!)