Replying to Help plz where to put my bind an what ski to use

Hi guys , I need some advices. I can choose between rossis s3 bc 2008 or guetto. I ride park the most but I dont want them to get stucked on pow. The thing is, also I dont know where to put the binding so I can ski pow and I can spin a swtch and forward in the park with no problem . I will choose 180 skis.           Last season I had ar6 1761 cm back center  and they where perfect on park but i couldnt ride them in pow. Plz help me.