One of the nice things about the 00+ cluster is the smaller range of the needle sweep. This causes 10-20 degree variations to be less visiable and since a small movement like that is expected..it'* a good thing.
Fans are where Karl mentioned..~216 and ~225... to me, this is where we have room for improvement. Each summer day I came off the highway..my temps would get up to the high fans and the car seemed to run hot.
I added an Intense PCM with the fans programmed on at my T stat temps.. wow.. I loved it. Since then I also found out my radiator was half plugged on the outside with dirt..even after many flushes.
00 Regal GS: All kinds of cool stuff.