For 44mm inset headtubes: avoid the Cane Creek upper headset. Opt for a Chris King or FSA.
I have been wondering why my upper seal and lower cup have crept out of place. The tolerances on the stock bearing were beyond sloppy, and the wedge that keeps them in place was plastic. I reamed out the press-in cup on the lathe and tap fit a BMX style bearing in place of the garbage stock bearing. I am really wondering why the headset didn't come with a decent bearing begin with.