for the 20% of time in the park, you may prefer the SB 170. The SB is 90mm under foot (as opposed to stealth 85mm). It is a wider platform throughout, and slightly softer for quick turns in soft snow (tight trees!).
In the pro twins line, I would reccomend the Stealth if you are taller than 5'6 and/or heavier than about 140 or so. If you are smaller, go with the Chopper. If a 170 is too much, the Predator 160 is sick.
*****I dont want to flood the forum with messages "plugging" the skis. Send me a message if you have any specific questions****
the website is comming, I promise!
Spinks