Max resolution the iMac can support

Hi kids,
I'm using the desktop extender hack with my 800 and 1.25 iMacs. Right now, I'm using 17 inch monitors(1280x1024). What's max resolution these iMacs can drive? I want to upgrade the monitors to 20inch, 22inch, or maybe even 24inches. Anyone have experience with this or know exactly what these video cards can take? Thanks.

Ok. I went ahead and did it. I got a PrincetonVL2018W 20" LCD Monitor. But I'm having Problems. When I first hook it up to my 1.25 G4 iMac, I could only get it to 800x600 resolution. But after a long while of playing with it and trying different resolutions, I finally got it to 1680x1050. It looks great. However, if I turn off the monitor for about 3 minutes and then turn it back on, I have to start the whole long process all over again. I also tried this process on my iBook and got the same results. Does anybody know why this is?

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