@lorddef
If you have a mediator + voodoo3 or virge, you plug your vga monitor directly to these cards.
You don't nedd a scandoubler, but you can't see old amiga modes.
I have bought mediator after plugging in a vga monitor, infact i have a scandoubler that i could use to display olt modes. but i never use it, with the last boing bag i think (but not sure) that you could display natively the early startup screens on a vga monitor....