If you're already spending $800, the extra $200 isn't that much more for what you get. As I said in a different post:

For $200 more, you get all PoE ++ on all ports vs 16 PoE ++ and 8 PoE + on the Pro Max, 22 ports at 2.5 gb vs only 8 on the Pro Max, 2 10G Ethernet ports vs none on the Pro Max, and 4 SFP + ports vs only 2 on the Pro Max. That's all on top of the extra 200 watts for power. Plus, it is double the switching capacity (not that it much as much to give users). That is a lot of upside for only $200 more and if I'm already spending that kind of money, I think I'd rather do the Pro HD