My modeline is
Code:
Modeline "1280x1024" 167.25 1280 1344 1504 1728 1024 1025 1028 1072
with
Code:
HorizSync 30-96
VertRefresh 50-160
You may start from my modeline, but that's rather high (I've got 17'). If you have problems I recommend xvidtune. It allows you to change the settings in fly so you can get best config for your monitor.