In my mind the XRGB 2, XRGB 2 Plus and XRGB 3 are the best RGB Scart to VGA adapters for your money.
The XRGB Framemeister Mini, the newest converter supporting HDMI instead of VGA fails, the The Framemeister Mini has about 24 ms of image input lag.
If you really need HDMI output look for a decent VGA to HDMI converter to stack with your XRGB 2, 2+ or 3.
For the best video quality hands down, forget modern flat screens all together. Get your self the CRT Sony PVM monitors, preferably one with a low number on its hourly usage meter.
The PVM monitor can accept the 15hz 240p RGB signal from a Scart cable with very little adaption. The signals are almost electronically compatible, almost as if you don’t have clean sync (and not composite as sync) you need a sync cleaner. Most of these monitors use either BNC connectors or a DB 25 connector, the plug adapters to convert Scart to BNC usually include your Sync cleaner.
You will have to provide separate speakers for sound.