That looks like a deal, the DK is a great tractor, out of production now, Tier III, and very hard to find now. I was quoted that plus an upcharge for financing. On R1 vs R4, I'll take R1. Compromises make no one happy, and R4s are a compromise between turf and ag tires. If you're doing lawn care work, go with turf, if beating up the ground is not a concern, get ags for the best traction. If you're working in snow, the industrials will just fill up with snow, slush, and muck and spin. I know industrials are good on hard ground, but that's it. Both tires will support as much as the loader and front axle can bear. Basically, get R1s if you want traction. (in case you can't tell, I have ags on my CK)