AR7's are pretty bomb. They hold an edge great and will shred it up as a great ski. Can't go wrong with them. Halos are a park GOD. They will not ski the same as ar7's (coming from a racing background) but are incredibly fun in the park. The swing weight on the Halo's is super low as well. So take your pick of the two. Also the Alpha 1's can be substituted for the Halos as they are super similar, just the Alpha's are stiffer so if you do larger jumps most of the time Alpha's may be the best choice for you.
Sparknotes: AR7's for overall goodness and great handling, Halos for less carving but amazing with jibs and most jumps, Alpha's for large jumps (60+) but still good for jibbing. That is my two cents.
You terrain park would be responsible for more deaths than Hitler. - 45.