I can't choose what pi to get next

Thing is is I kinda want a 64 bit pi to run windows on (wor)

The Pi 4B and Pi 400 are 64 bit capable? The official Pi OS release just happens to be 32 bit. There is an unofficial (still being worked on) 64 bit Pi OS version you can run on a Pi 400 or Pi 4.
Index of /raspios_arm64/images (raspberrypi.org)