depends what you wanna view, 1084s or cheap LCD TV will be fine for basic resolutions.
multiscans like the microvitec 1438, will handle all PAL/NTSC and VGA alike AGA modes.
plus if you have a GFX card, you can use an LCD tv with VGA in from the GFX card, and standard in from the RGB connector... or multi screen it, with a cheap LCD monitor on the GFx card, and LCD TV on the RGB...