Funny thing was... my first wheel bearing change was from the dealer. I did the second one with the planetisuzoo article. You could tell there was water in the hubs on the 2nd change. Upon change #3, the one after I did my own, they were perfect. Every repack I have done has resulted in NO water in my hubs. I use the synthetic grease was well, which may not make a difference there, the seals are the same brands people talk about here, but the most important thing I think is to wire brush the external cap and the hub each time down to the clean metal, and silicon gasket the cap back on. Very important in my book. I've got about 130k on mine now... and it's running like a top! (new engine from isuzu at 103k)...
Also, I was under the impression we needed to repack the wheelbearings each 15K... I don't carry my manual in my pocket so someone has to help out with this one.