I agree with what has been said. If you overclock go with the 1800+, but if you
don't overclock just go with the 1900+. I myself, have the 1800+ unlocked to
1.64Ghz. However, I am looking to get more speed. I can probably hit 1.7Ghz,
however, I would have to do a little tweaking. For the mone, 1800+ OCed!
You might even be able to unlock an 1600+ an get 1900+ speed!
CreeDiddy