The probe to get
If you are going to carry a probe (and you should), this is the one to get. It isn't the lightest or easiest to assemble, but it is very strong and won't let you down. Doily little carbon probes and ski pole probes bend and break in hard snow or avalanche debris. The G3 Pro Tech probe will not only last through many practice probes, but will work when you leave it set up for weeks at a time while probing glaciers for crevasses.
The large diameter tubing and stout ferrules are a plus. The downside is that the screw top adjustment takes time, but hopefully your partner can be digging for the victim while you are getting your probe set up.