I got the Raptor SD 54" yesterday the 14th. I went with my dealer here in the county I live in so I will have the support from them. Very friendly and knowlegable of the machines. Hustler has a $200 off their machines plus a 24, 36 or 48 month 0% interest offer. Got approved in less than 20 minutes and he delivered it some 30 miles for free. He even went over the does and don'ts and maintenance best practices. The reason I went with the SD (Supoer Duty) is because the blade shafts are 1" vs 3/4" on the standard raptor and the front forks are 3/8" vs 1/4 or 5/16 on the standard. The frame is heavy duty and the front arms are super reinforced. I went with the 25 horse Kohler mainly I guess because it's an American name and I assume parts availability and cost will be better. It also has the auto choke vs manual choke on the Kawasaki. Oh, and it's cheaper too. All total I mowed my acre today in less than 30 minutes for $4,200 including 3% dealer fee, $50 loan processing fee and taxes. Not bad for a machine this beefy I guess.