I know I am a tad late as it seems you have already ordered them, but I will offer my thought anyway. The biggest thing for me is to make sure you get them somewhere with a good return policy. That is not to say they are bad or anything, but they certainly are not a slam dunk.
In the 4 months I have had mine, there are two major issues I have with them. One, the weight makes it hard to wear them if I am at all moving around. For example, I cannot vacuum the house with them. Two, with ANC on they create significant pressure. The pressure is to the point of making me feel sick. It makes the ANC useless for me. Both of these may or may not be a problem for others, but that is why I suggest a good return policy. If those things end up being an issue for you, returning will be your best bet. With the price drops and what looks like lack of demand, resell prices for these are not fantastic at this point.
On the positive side, the transparency mode is absolutely class leading. When you are not moving around, they are pretty comfortable. The sound is good, even if not to the level many claim. They are not anywhere close to a good wired headphone, but they are not really supposed to be. The multi-device connecting is fantastic.
People thought the HomePod was selling too only to later find out they had never sold through the original run. The AirPods Max are taking an eerily similar path to the HomePod. Appears to be sold out early on only to be all the sudden easily available at under MSRP. I think this will be the one version of the AirPods Max. We may see a HomePod mini like version, but I do not think we will see a second version at this price point and materials.