You can't do anything about the Red/Dead pixel.
25ms refresh is so last year, well the year before that.
8 and 4ms are more common these days, the Samsung Syncmaster 913n is 8ms (last years model about £180 at the moment).
The delay your getting will vary from app to app, but will show up more so with video playback and window moving (if you fast at moving windows).
It won`t have any effect on any animations you create, they will be created at what ever settings your using. Tho you may see some issues with your playback (note playback, it don`t matter how fast or slow your monitor is, it has nothing to with the creation of video/animation etc).
Take it back and say its to slow for your video needs !