OK, Just an update.

Ive got my second N900 now.
The speakerphone seems to work ok.

There are "less" stuck pixels now.

Ive counted 2 very small ones (evidently small from the screen res )

These are NOT in annoying positions ( both where the main menu button is ) so cant see them unless looking very closely with a black BG on full screen

Also now when i tilt the screen , there is "less" night sky effect with only a few shimmering pixels.

I can live with this so will consider case closed.