When I was buying a spare set of bearings for the "just in case stuck along side the road" scenario, where I go
http://www.sixrobblees.com/also supplies many shops with trailer parts. They surprised me by saying the brand of bearing I have even though they are made in china they don't have very many problems with them and would recommend replacing with same. The brand is called "Gemini". As far as the seal goes that is different he said and highly recommended "tru-ride" (e-trailer also has them). He said the spring on back and how pliable and thick the rubber is plays a big part in separating good and bad in seals
http://www.etrailer.com/Seals-for-Trailer-Bearings/TruRyde/RG06-090.html If it were me... Before you do buy anything, I would check the price of the parts for what you want and add them up. Sometimes you can get whole assembly for less then buying part by part and just have to bolt it on. If FW manufacture is going to pay I would make sure what exactly they were paying for before buying whole a new set up. Just new brake pads, no big money expense there IMO.
As far as grease goes I used to use Ford super high temp grease at $12 a tube. Not anymore switched to "Supertech" as it is much cheaper and you can get at any Walmart 4$ or 5$ I think.
Lithium complex, NLGI: grade 2, Droping point: 450 min and "marine grade" which only means it has 1 1/2 or 2 percent more anti-corrosion stuff than regular grease.
I also made the decision to change grease because if my bearings are running more than 450 degrees it doesn't matter what type of grease I have, I've got a problem.