I am buying a M1 Mark III to replace my Fuji X-T3 system.
I also want to get the Olympus 40-150mm f/2.8.
At the wider focal lengths, do you recommend getting the 12-40mm f/2.8 or a couple of quality primes such as the 17mm f/1.8 and 45mm f/1.8 with less weight, more light and perhaps better image quality than the 12-40mm zoom lens? I realize the f/1.8 primes are not weather sealed, and if weight and money were not limitations, I would consider the f/1.2 Pro versions of the 17mm and 45mm when there is a good sale.
I am also interested in the 8mm f/1.8 fisheye to use with Starry Sky AF, and if we are really dreaming, someday the 300mm f/4 for bird photography!

What options do you suggest for best image quality and low light performance without totally breaking the bank as I migrate from Fujifilm to Olympus?
Thank you!
Craig