I did a thread search and I'm sure it has been covered, but I couldn't find it. I'm looking for a little advice. I just came across a good deal on a 2010 450 involving a trade for one of my bikes. I would prefer to buy a 570 on the always popular viewpoint that bigger is better, but this is saving me a ton of $. I would like to hear some impressions of both bikes. The bike will be ridden primarily by my 21 year old son. He's 6'4" 200 lbs and has a about 5 years riding experience. He's been using my KTM 950se and is comfortable on it. We are mostly riding fire roads with some limited road use. I will jump on it once in a while, and I'm pretty big. 6'0" and 250lbs. Btw this 450 is currently tagged and I anticipate no problems tagging it in PA. I know there are some advantages in the 2011 570, but I don't see a problem regarding the 2010 450 being street legal here. Any thoughts? Thanks...