Nice new build,
@Dani305 !
That is a fast start to the hobby! Hopefully all goes well with your new build.
75-gallon tanks are a nice size, small enough for a manageable start but large enough for more stable water parameters and for some nice fish types and numbers.
Your fish list looks pretty good for your considerations, but I think it is well recommended to hold off on the mandarin until the tank has been established for a while to have enough natural copepod populations for maintaining health.
Welcome to R2R and congratulations on your new build thread!
P.S. I don't mind that I noticed the Model A, as I've dreamed of having one some day as well. I missed a chance at a farm auction 5 years ago when I was not yet ready for it...