New hubs won't be packed with waterproof grease. If you go that route, I'd go ahead and get 2 new seals, pull the bearings, repack them with marine grease and put new seals in. I know I'm anal about things like this, but "knock on wood" I haven't ever had one fail.

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14