I recently bought a RTV 520 and it came with a windshield and canopy. I went to my dealer to find doors and a rear enclosure. He informed me that the Curtis/Kubota hard ones were $7500. I opted for a soft door option (that opened and closed, not zipped) for a little over $1000. The quality was horrible, fit not good and the open/close mechanism was cheap. I'm fortunate that my dealer is good and they are happy to allow me to return it for a refund. I feel like if I am going to have dubious quality, may as well go for a zip up which is way cheaper. Any advice or experience with specific brands? Thanks.