I would agree on the re sale. On any machine I've ever bought or sold smaller is cheaper in my mind better or not. The 570 is and has been promoted by polaris as an entry level machine. It's a good one and depending on what you want to do with it may fit your needs and be all you ever want it to be. If your plans are turbo or big bore go fast stuff there is no misplacement for displacement, even with the old push rod design you'll be able to get more power from a boosted 800 then a boosted 570. 570 has a much better design being overhead cam and will get double the mileage probably 10 times the life of an 800. Stock for stock they're dam close I ride with my uncle who has one. I haul 10 gallons of extra gas he laughs every time we stop for me to fill up. For me I wanted to add the go fast stuff so the 800 worked better for my needs. Don't get me wrong a turbo would really wake up a 570 but it will not get the numbers that have been attained with the 800. Look back at the rhino same design engine only bigger and everything they tried to get it to run, turbo's big bores ect... most did motor swaps. If I was going to leave mine relatively stock maybe an exhaust, wheels and tires I would buy a 570 for mileage and longevity, both need shocks upgraded and with the money saved buying a 570 the shocks would about be free. Either one you buy will be equally fun so get off the computer and go get one. I sure wouldn't let any resale illusion sway your purchase because with either one especially if you mod and accessorize your going to take it up the butt when you sale it. Buy it to have fun not to sale it, you can't go wrong with either one, good luck.