Replying to Atomic Tweak or Head Mad Trix?

Hey guys, Im looking for your help once again... I was hoping youd give me your opinion on which ski would better suit me the 171 or 181 mad trix or 181 tweaks. Im 6'0, 160 lbs., Im an advanced skier but a beginner in the park. Im looking for a ski that would be used for about 60% all-mountain(mostly moguls and glades) and 40% park(for now anyways). I live on the east coast and often have to deal with ice. All help gets my immediate kudos.