El Rey: Great for bigger jumps and larger features. It is relatively stiff so if you're looking for a ski that will hold nice and firm on landings, they'll fit your riding style well. Don't know a whole lot other than it probably fits someone with a bigger stature rather than a small lanky kid just because flex is a bit high, unless that's what you're looking for.
Ar7: Classic camber park ski and pretty good on all features. Intermediate flex so it handles well on both rails and jumps and is perfect for medium to large sized features. My brother rides these skis and he's a slightly larger guy (6'2" 240? lbs) and they hold up a lot better than I expected for him. He loves them and says that are perfect amount of butter and stiffness and his jump game has noticeably improved since last season.
Halos: I have been riding these for the past couple weeks and they are a nice poppy ski that is super fun on rails as well as jumps. I've been hitting about a 35 ft jump and its been holding nice and firm on the steep landing. It has a rocker tip which was a little weird getting used to in the park but overall is a super fun ski. Definitely the best ski from the lineup if you're into butters and presses. My favorite part about this ski is it rides with the stability of a heavy ski but you can bust out really quick 270's on because of really low swing weight. I'm pumped to have them and recommend them for anyone who loves jibbing and intermediate-sized jumps.