I think I have narrowed my choice down to either a NH TC 18 or TC 21D. THe dealer says the 18 will be more than enough.About $1400.00 difference between the two. TC 18 W/ loader,HST, loaded tires, PS, block heater and rear work light: $13,500.00. TC 21 D same as above $14,900.00. I need some...