Just got back from the dealer and looked at the z545R and z730M. Priced 6000 and 7100 respectively w/ a 54” deck. I was surprised at how large and beefy both were. The R model has more frills which isn’t a requirement, but I don’t think I want to go all the way up to the R model with the 700 series bc of price, so it looks like I’ll be choosing between a 545R and 730M, unless I’m missing another option. 1.5-2 acres of flat semi rough yard/pasture. Also found a used 2013 915B with a 48” deck and bagger for 6300. Opinions?