i had overheating problems at idle and at highway speed. I replaced the rad with the CSF from Dirk @ DPG. And because I didn't want to go back in to replace components one at a time, I also replaced the t-stat (stock replacement,) upper and lower rad hoses, water pump, belt, and got one of those high flow t-stat housings. I didn't replace the fan clutch because a friend had loaned me his old one to test. I still get a little temp rise at idle for a long time (like in a slow moving drive thru) so the fan clutch will get replaced with a new one soon.
As for overheating, at any speed, I stay right under the 210 mark on my temp gauge with AC on and 105* ambient temp. Before, these conditions would have put me at about 225* on the guage.