I totally disagree with you mile9c1 but respect that everybody is entitled to their opinion. I've been watching this site for a long time and there are very few who post a negative perspective of the 900 ACE NA.Sorry the 900 has too many compromises for me. It's pretty slow and doesn't sound good at all. My cousin sold his this spring because his wife refused to ride it. It took him driving a 15 year old 2-stroke to remember that sleds are supposed to be fun.
I don't like to rain on parades but I was suckered into buying a 900 after reading all of the positive reviews on this site. I wish I could have tried it first. I would have returned it for a 600R.
I do agree that test drives are key, especially before buying a new one. Buying used comes with a lot less risk of losing money, if you know prices.
Strong advice for anybody test driving a 900 ACE NA - if you're used to driving a 2-stroke, you are used to spending a lot of trail time in the first half of the throttle. The iTC is not set up like that. It is calibrated so you have a lot of modulation in the first half, at slow speeds. At trail speeds you're into the second half of the throttle, that's where the fun begins. You have to think, "drive it like you stole it", and you'll never look back.