first of all, we need your weight, height, bsl, and ability level to determine what din you are going to be setting these mystery bindings at. Or you could just tell us the din you are rockin now. then, read this thread for reference.
https://www.newschoolers.com/ns/forums/readthread/thread_id/481906/
Once you've figured out what din level binding you should be at (try to have your din right in the middle of the range i.e. if you're rockin a 8, a 3-12 or 5-14 would be way better than an 8-18) then start looking at individual bindings.
Here are some good park bindings (im assuming you will be using these halos for park skiing) to look at once you know what din range you want.
-Rossignol fks/ look pivot. This is widely agreed to be the best binding on the market and are pretty much indestructable, but they're relatively heavy, and have very low adjustability, so if you're growing a lot and plan to get new sized boots before you change skis, don't get these unless you want to remount. the pivots and the fks are identical in every way except for color. The rotatable vertical heel means highest elasticity on the market meaning pre release is pretty much gone. Unfortunately, the low din version of these bindings comes in at about $300, but you can find some used in the sell/trade forum
-Salomon sth driver. Another great binding. This is one of the more lightweight AND adjustable bindings available on the market. Some who swear by the fks will tell you to avoid these, but honestly If you decide against the fks, these would be my next choice. They're also a bit better price tag than the fks. A perk of having these bindings is adjustable toe wings, to get a perfect fit to your boot, meaning less pre-release. Unfortunately, the heelpieces are very horizontal, so vertical pre-release on landing and nose presses could be more of an issue. Stay away from all salomon bindings except for the driver series, as the automatic toe wings/height are prone to failure. the oversize is ok, but the z toe is what you really want to stay away from.
-Marker jester/griffon. These are the same binding, except the griffon has a 3-12 din range, while the jester has a 6-16 din range. The jester is also a bit lighter, although both of these are exceptionally light. These are pretty common freestyle bindings and have an exceptionally level platform, meaning better switch skiing. The heelpiece is also close to vertical, so vertical pre-release is less of an issue. Lots of people on this sight will tell you that griffons will fall apart in seconds, but for lighter weight skiers. this is a great, lightweight, cheapER choice of binding.
-Look/rossi/dynastar px series. Slightly inferior to the pivot, although still a great binding, the heelpiece on these is almost completely vertical, meaning some of the least pre release of any non-rotating heel. Unfortunately, these bindings are also much heavier (for freestyle bindings), but they're EASILY swingable. A good, bomber, inexpensive binding if you don't want to dish out the cash for the fks/pivot.
Keep in mind there are TONS of bindings out there; these are just some of the ones I'd choose. You should probably go to a shop before you actually decide on a binding to buy.
cheers,
Isak.