So I can't make up my mind! I'm looking at these three machines in 60". I only mow my own property which is about 3 acres. Probably will put on 60 hrs a year. May pick up a few yards on the side down the road. New 930m (Kawi) $8400 New 915b $7300 Demo 12' 925m (19 hrs) (efi) $8400 I know all these machines are overkill for my use but I dont want a residential machine. Im worried that the 915 may struggle with power with the 60" deck? Any help is appreciated!