Hi,
You could get hold of an A520 modulator and at least use colour composite video - this should be a bit better than RF.
Otherwise, what sort of TV do you have? I guess SCART connections aren't common in the US but if they are, you can get an RGB lead to go straight from the Amiga.
Other alternatives are the multi-sync monitors that appeared when the A1200 and A4000 were current, such as those made by MicroVitec (still available new in the UK at least).
Or you could try finding an LCD monitor that will synchronise down to the 15KHz modes of the older Amigas.
Or finally, get hold of a cheapo
VGA box and you'll then be able to use a standard PC monitor - be aware that this is still restricted to the Amiga's composite video output though, so quality won't be great.
- Ali