There is an excellent thread at English Amiga Board about using RGB-to-SCART cable with Samsung Syncmasters (which are essentially LCD TVs with SCART input). Results are scandoubling good. I will try to find that link and post it here tomorrow.
I have spent too much time on looking for scandoublers and just don't like the idea of spending hundreds of dollars on it. I'd rather buy a monitor/LCD TV (plus cable).