I got tired of buying tires for my 1800 every 5000 to 7000 miles. I had to find a better tire ---- I found the I get about 30000 miles from a 195 55 16 Hankook tire made for a sports car---- they work great ! and you can buy them from Pep Boys for about $90.00
I hope you meant $585 was the price to install including the tires. If not, you've got to find another dealership. I will only be getting a Wing in the spring but I have been paying $40 for the front and $55 for the rear for mounting, balancing and installation. Right now I'm riding a 2006 Stratoliner and have been getting my work done at a Honda/Yamaha dealership here in Massachusetts. Good luck with whatever tire you decide to go with. Unfortunately I have only been getting about 9,000 out of a set of tires so when I switch to the Wing there won't be any great dissappointment when it comes to tire wear.