I'd get a Microvitec 1701 or 1764 - a nice 15Khz Amiga branded 17" CRT with adjustable screen sizes!
Failing that, is it possible to access Sys:Prefs/Overscan to scale things down a little? I know this won't affect games but it'd help with Workbench (/Apps).
It's easier for PAL users as NTSC will be a squashed image but with everything still visible, with NTSC you get a taller image that goes over the viewing area (since PAL is 17.5% taller in terms of pixels).
I remember Fairlight made some `cracktros' with a built in NTSC/PAL switcher (they even did one for Wipeout 3 on Playstation!) - this makes me wonder why there isn't a program to install a boot selector onto the bootblock of floppies. Must be possible!
:-)