The 05s do get a lot of badmouthing for some reason (and even reading as many posts here as I do, I still haven't really figured out why)
Just my personal opinion
If you had been involved with the 900 crowd as much as you are now, you'd know why. 05 and 06 were very frustrating for the guys that bought these things new. We owe those guys a great deal IMO. I think even MH would agree that the percentage of good performing, non-problematic 900's compared to the headache/heartache, I'm getting out of the sport owners of 900's was about 50/50 in those first two seasons. I've been involved in some very sketchy and technical 1 and 2 day recovery missions....900's cranks, stators, flywheels. Spending all night getting out of drainages we dropped into as we couldn't climb out of with runnability problems, belts blowing (one sled blew 3 in a day) and returning at 4:00 am.
Two of the 900's I ride/rode with would typically end up at the dealer each monday morning those seasons...
You'd never believe it these days...Now the 900's are the most reliable Polaris'...???
As for the 05 and 06 chassis...once you ride an 06, you'll never want to ride an 05 again!!!