here's what my situation was:
I had a Vodooo 3, which ran a Daytek DT-75P monitor, using the Plug and Play drivers.
I think it ran it at 60hz, though I don't know if I ever checked that before. I probably didn't mind 60hz, as I'd never gotten used to anything higher before (ie, I ran an old monitor that had 60hz as the max refresh rate before).
anywho, I switched video cards to the Radeon LE, but it didn't support 1280X960, so I ran it at 1152x864 at 100hz (which wasn't as crisp as lower refresh rates like 85 hz btw, but that's a Radeon LE issue).
once I finally got 1280x960 enabled (enabling it in the registry), and available in the display panel (I had some problems getting it there, though I can't remember how I fixed that), I tried it out. after resizing the image, I noticed that the 60hz refresh was just too much to handle for my eyes, so I stuck with 1152 by 864.
yesterday I happened upon drivers for my monitor (I had been using Plug and Play, cause I heard they worked the best with everything), and installed them. but I didn't try this res until today.
guess what? I'm now running 1280x960 at a refresh rate (according to the onscreen display) of 85hz! ahhh this is bliss!
btw, 1280x960 isn't supported officially by my monitor. ie, the monitor CAN RUN it, it's just not one of the main resolutions (ie, 640x480, 800x600, 1024x768, 1280x1024 <--whoever came up with that needs glasses, 1600x1200)
and 1280x1024 isn't so bad in games, becuase afaik, the game sort of compensates for the different aspect ratio.. ie, 3D things don't look squished, becuase they're internally rendered the same way, just output to the monitor with a different res. however menu's etc, that aren't 3D DO get the 5:4 squish applied to them