You might want to check out this pinned thread on Z4M wheel fitment and maybe make a post there since people might follow that thread more:
https://www.zpost.com/forums/showthread.php?t=87131
Are they ET43 both front and rear? I don't have a ton of experience with aftermarket wheels on this platform but I would say the offset of those wheels is a little too high, especially in the rear. You'd have to run pretty large spacer in the rear which would likely warrant a stud conversion. If you want to go wider than 225 tires in the front you'd probably need a spacer up there too. High quality spacers can be OK but they're not ideal compared to proper offset wheels. The fitment really depends on what width of tires you hope to run and a little on how much camber you have in your alignment after installing the coilovers.