I have three IQ's two 07 600's and the 08 700 Dragon, the two sixes still have sway bars and the 7 does not. They all do the same thing down hill, I been riding IQ's for three seasons now after coming off an Apex. The first couple seasons I was just happy to be riding sleds a couple hundred pounds lighter! Now I am starting to really get picky with the handling, especially after riding a superior handling machine. I've changed the front end all around, stock, fabcraft, multiple shock combos, spring rates, back to stock with multiple shock combos, etc. the machine still sucks going downhill, no matter how you slice it. So, now I'm looking for the things I haven't f'd with yet. Like ski pivot, skis, track angles, track location, ride height (higher), straight vs. angled rails and the like.
Thank you all for your replies, I think I am going to raise the back end, alter the caster angle to maintain stability, and modify the ski tails like carls pp's. Oh, and add the turbo....