scandoubleur for my miga

[lionstorm]

Hi all,
I am just fed up to switch between vga to 1084 when playing whdload installed games so I decided to go for a scandoubleur but which one ? I know their quality are not the same.
My config is A1200T+PPC+BVPPC+CV64/3D+amigaos3.9
Lio

[lionstorm]

I looked at it but this looks confusing with no idea about quality. Anyway I guess an internal one is better than an external because you convert the native signal and not the signal going out from the RGB. Scan magic looks like a good product www.relec.ch but I still dont know if I need 2 entries on my VGA to be able to display the signal from my gfx card and the signal from the native RGB.
Lio