What to replace my anthems with?

Need to replace my Line Anthems this year.  It's a sad time as I've loved skiing them.

I'm thinking about replacing them with either the Line Step Up or the K2 Domain.

I'm a advanced skiier, skiing 65% park & 35% all mountain, mainly in Europe. I'm 5ft 3 and about 65kg

I like the way the anthems feel in the park and ripping the mountain but I'm thinking about getting some more playful skis.

Can the domains handle groomers or are they only for getting to and from the park? 

How does the stiffness of the step up compare to the Anthem?

How does the rocker of the domains cope with ice, moguls and groomers?

Cheers for the help!