Hi there,

I use an professional upscaler from "cinemateq". It is called "picture optimizer" and is able to convert the rgb signals from the scart adapter lead to vga. I got it from ebay for just the same price as the mentioned s-vhs/composite boxes. I use it with an A500+ and a 21" vga crt display.

It can upscale to 720p/1080i and because of newer models you may find one second hand.

http://cinemateq.de/index.php?cat=c5...7df03349df5784

only german, but you can see the posible resolution.