I have a IX and a X. The 9 is pretty much stock, it was my first car and I got it second hand it's got a few mods on it, just an exhaust and some intake mods, I didn't have much cash when I was starting out. Just keep in mind to service it regularly, otherwise you can loose power.
As for the 10, I think I recall winning it. It sat around my garage for a while, didn't get to drive it much, but after about 6 months I decided to throw some cash at it. After about $100 000 I had myself a winning car, very very fast. They're great cars, I recommend you get one.