Okay, little update, I tried powerstrip, and it worked exactly right! I now have even games working right, even with overscan (in other words, if they overscanned off the screen with the Amiga, they overscan right off the screen with the emulation -- meanwhile, the entire glass of the monitor is filled up exactly right with the image -- AWESOME!) It's even better because I can (and must) tune it to be, for example, 720x480 (NTSC), at 120 refresh rate, so everything looks rock solid.
Cool, thanks Electro! :-D
Erik