The Trojan is awesome...mine has 40,000 reliable rounds through it and is smooooth as butter.
The new forged frames have the high undercut which I love about the Trojan. Checkering on the Sentry feels better, so all else being equal, the forged frame with new undercut wins for me. You should also consider the Lawman or Sentinal Premier to hit the whole price range.
Front serations.....can't do without them!